DIY monitor repair samsung s19a300n

In detail: do-it-yourself repair of the samsung s19a300n monitor from a real master for the site my.housecope.com.

It so happened that once the screen of the Samsung 740N monitor, which has faithfully served me for almost 11 years, suddenly went out almost immediately after turning it on. Other attempts to enable and disable were unsuccessful, because according to the signals from the sound card, the operating system was booted successfully, it became clear that the problem lies in the monitor. Of course, a radio amateur cannot so easily throw out an old electronic device without trying to fix it, well, or raskurochit broken device for parts, then how it goes.

A quick search [1-6] showed that the most common problem with this type of monitors is the failure of electrolytic capacitors in the power supply. In general, even the most novice radio amateur can do such repairs, so you can get by with the purchase of several radio components at the place of purchase of the monitor, which is a couple of orders of magnitude cheaper, the cost of your own time, of course, is not taken into account. But in order to repair something, you first need to get inside the monitor, do it carefully, without marks on the case, perhaps the most difficult part of the repair. First, you need to put the monitor face down, so that the surface of the screen would not be damaged, after that you should unscrew the screws holding the stand.

Image - DIY monitor repair samsung s19a300n

The back cover of the monitor is held by latches located around the perimeter of the monitor case. To open the latches, insert a strong thin object, such as an unnecessary plastic card or a metal ruler, into the gap between the screen frame and the back cover, and then sequentially and slowly unscrew all the latches holding the cover. Under the back cover, such a spectacle appears before us. In the next photo, the cover that covers the power connectors of the backlight lamps is also removed.

Video (click to play).

It should be noted that the metal casing visible in the photo above, to which most of the structural elements are attached, is fixed in the desired position with the help of the back cover and is not fixed to anything else. Before further disassembling the monitor, carefully document the wiring of all internal connectors. True, a real chance to confuse the connectors exists only for the power connectors for the backlight lamps.

Just in case, we fix the position of the remaining connectors.

Now, from the actual screen, you can remove the casing with the printed circuit boards fixed in it.

Then we remove the power supply board.

As expected, three failed electrolytic capacitors are visible on the board.

Finally, we disconnect the power supply board and remove the protective film that covers the board from the side of the printed conductors, this film is held on 3 plastic clips.

In addition to the obviously failed capacitors, a number of sources reviewed recommend replacing the capacitor C107 for preventive purposes.

This radio part has been replaced with a 47 μF x 250 V capacitor.

Just as the reviewed sources indicated, the fuse F301 breaks down along with the capacitors. In the photo, this is a green radio component, which is visible next to the swollen electrolytic capacitors.

We remove suspicious and clearly damaged radio components from the board. The main culprits are that the author of these lines was left without a computer on May 9, 2017.

In place of the failed radio components, we install similar capacitors. Instead of a 3 A fuse, a 3.15 A fuse with solder leads is installed.

After assembly, the monitor's performance was fully restored, after three weeks of intensive use, no deviations were noticed in the work. The author of the material is Denev.

- When turned on, the screen vibrates in places;
- or half of the screen disappears as shown in the photographs;
- or a strip in the middle of the screen as shown in the photographs, then after a while it can normalize again as shown in the photographs.

I took it apart and photographed the insides just in case.

Moved the loop to the matrix during a failure. If the picture changes - non-contact of the loop, wash the contacts with alcohol, secure the loop with tape. How do the containers feel?

In the fifth and sixth photos, the capacitor (the largest in size, to the right of the bottom connector) is swollen or flare?

Judging by the first photo, a malfunction of the matrix. The monitor was probably still under warranty, and if you gave it to the ASC, the matrix would be replaced free of charge.

If the first advice did not help “to wash the contacts with alcohol, fix the train with tape,” then most likely the decoders will fall off. Once I came across an article on practical repair with a step-by-step description - if I find it in the bins, I'll throw it off. Once, a couple of years ago, there was a similar case with a 17 ″ LG monitor, albeit with horizontal decoders - half of the lower part of the monitor with lines like yours. “Repaired” by lightly pressing on the iron rim going around the die in the strip area. Of course, this cannot be called repair, but the monitor has been working for the third year and no relapses)))))))))))))

Monitor - opened, seemingly everything is in order. I am looking for the cause of the breakdown. I'll start by ringing these transistors (on the advice from YouTube).

I found the most suitable datasheet I have "9945n" and the datasheet on "FDS9945". I would be grateful to those who write how such schemes call, well, as I understand it, when applying to pin 1, it should call 7m and 8m, etc., but I don’t understand about the 2nd and 4th. I'm not mature yet)

By the way, if the condender is not ripped, should it be soldered and checked, or what is the best way to deal with the condenders?

I am new, but I am learning and I plan to keep learning. Anyone who has no patience, please do not write to me about this.

Added by (10.03.2016, 21:53)
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These Samsungs usually have two troubles, trances and transistor assemblies. Well, the lamps themselves are also worth checking out.

Well the transformer is ringing for the break, right? Lamps cannot be, since the diode near the button does not light up, right? Transistor assemblies, I seem to have already checked. Looks okay. I measured the voltage at this output, this is what happened

which goes to the scaler (if it is called that) the second board with output to the monitor.

Replace only these conduits, what did you circle? I rang this coil, which is green, it's okay there. And what is it (circled in red), check them?

While I will change the Conder. Although I checked them for a capacity above 200uf (the tester does not show it anymore).

Added by (11.03.2016, 10:01)
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I understand that the onoff output should have a voltage greater than 0.6 volts (((

They brought 2 samsung monitors for repair - 940n and 740n. Most often, these devices have problems with the power supply, but, interestingly, there are several modifications of these same units for the forties models. Our guys got one modification for both seventeen and nineteen inch models. Accordingly, we will describe the repair of this modification here.

The first thing to do is to look at the display from different angles (preferably with the D-SUB cable disconnected, which VGA goes to the video card). If it is noticeable that the inscription “cable not connected“Then this is our patient. The backlight does not work for the patient, and everything else is normal.

Of course, in order to fix this beast, it must be disassembled. This is done quite simply - we remove the leg and half the body. I half the body using this blue piece that looks like a pick (photo below). You can buy it in most radio markets and one such thing costs about 15 rubles. It is not suitable for any technique, but for both monics, one such was enough for me.

After all the latches are unhooked, put the monitor with the display down and remove the plastic cover. The next step is to remove the casing that protects the wires going to the backlight lamps and unhook the loop 2, circled in blue. The cover can also be removed easily with a small, thin, flat screwdriver.After removing the casing, we detach the wires supplying the backlight (pictured below).

NewCompLine service center performs high-quality repairs of Samsung SyncMaster S19A300N monitors in the city of Samara!

Samsung SyncMaster S19A300N monitor specifications:

Size: 18.5 inch;
LCD matrix type: TFT TN1;
Maximum resolution: 1366 × 768;
Widescreen monitor;
Response time: 5ms;
Brightness: 250 cd / m2
Power consumption during operation: 19W
Standby power consumption: 0.30W

If your Samsung SyncMaster S19A300N monitor has stopped functioning normally - do not be upset and do not throw it away right away! Contact us at the service center! Our experts will repair your monitor and it will delight you again.

Don't waste time - bring your monitor to us!

Samsung monitor inverter board repair;
Repair (restoration) of the internal power supply unit of the Samsung monitor;
Repair of the motherboard (restoration of operability) on the Samsung SyncMaster S19A300N monitor;
Cleaning Samsung monitor boards from dust and dirt;
Samsung Monitor Memory Chip Firmware
Samsung monitor external power supply repair (if equipped)

and other work performed during the repair of monitors Samsung SyncMaster S19A300N.

All work performed is guaranteed!

IT-Center NewCompLine performs professional repair of Samsung SyncMaster S19A300N monitors in Samara.

The cost of repair work can be found - here.

You can get a discount for repairs here.

We have a very convenient service for the delivery of equipment to and from repairs. For more details, see - here.

Contact details:
IT-center "NewCompLine"
per. Repin - 11.
Tel. (846) 205-45-88, 342-56-56.

Today I will tell you how to repair an inverter with your own hands.

If your monitor has a defect that it turns off after two to three seconds after being turned on, and at the same time the image appears at the time of turning on.

A trance defect can be determined by a device for short-circuited loops, by resistance.

Usually one of the trances breaks. This is, in principle, a disease of monitors.

The simplest option, in the absence of a trance, is to install a new inverter, of which there are many on sale.

A detailed examination revealed a defect in one of the inverter trances. It is easy to check this: you need to try the working candle one by one, first at the exit of the first trance, then the second, and so on alternately. In a non-working trance, the candle will naturally not light up at the moment of switching on.

Without going into details, we solder the transformer of the TMS91429CT inverter so that the protection does not work.

After dismantling the trance, it will look like this:

Then we take a ready-made inverter, for the same number of candles (4 candles), which are freely sold on radio markets, radio stores, etc., such as: model SF - 04S402, dimensions: 135-45 mm. Or something similar, the main thing is to fit the inverter in size.

Next, we supply it with power and control, place it with Velcro in a convenient place. It may be necessary to increase the length of the wires from the lamps to the output of the inverter.

Here are some examples of inverter placement.

And here are examples of ready-made inverters.

It will not be difficult for a person to disassemble.

SAMSUNG 940N (R). Do-it-yourself inverter repair when the required spare part is not available.

When the hand is full, there are no problems, now at least trances have appeared on sale, but to be honest, there have not been any refunds after reinstalling the inverters, the method is pretty quick and affordable for money.

Thank you, useful information! =) P.S. Author, learn the language!

@ phantomm134 repair (replacement of trance) or something else in the power circuit in an old monitor - no more than 4000 rubles. new monitor with NORMAL PICTURE QUALITY - 10-16t.r. there is a difference?

@ phantomm134 "with LED backlight." brrr. cheap and with LED light. this is a gvn and not a monitor.

Firstly: it is almost impossible to determine a short-circuited turn (turns) by a continuity for resistance, because their resistance is too small for an intuitive assessment, this can be done only by checking whether the inductance of the transformer winding changes if one of the windings is short-circuited.Secondly: the ballast for the lamp is a resonant system, the elements of the cut (including the inductance of the secondary winding) are calculated based on the capacity of the lamp, therefore not every tr-r may be suitable for a specific model 🙂

I had a problem this was the smell of burning, as if something burned out and the lower part of the monitor darkened and the upper light did not change. Monique Samsung sins master 2243 I would like to know the main REASON FOR THE BREAKAGE and the approximate COST of the repair they took me 2000 thousand rubles at the price of Monica at 5500 rubles

Hurray, you can continue to stare at the zombies and jerk off to this collective farm!

Hello everyone. Today I will tell you about the repair of the Samsung S19A10N monitor, which came in for repair with a very interesting malfunction.

The problem was that when the monitor was turned on, the screen was all gray and gradually stripes appeared on it. Personally, this is the first time I've encountered such a monitor malfunction.

Let's start the repair itself. The first step is to disassemble the monitor. Bend the latch along the contour with a metal spatula and remove the back cover.

We disconnect the wires of the backlight lamps, the matrix cable and the scarf with the power button.

We take out the metal basket where the power board and the control board are located, unscrew the 4 screws that fasten the boards.

We clean the boards from dust and dirt. We do a visual inspection.

I did not find any obvious defects. Since the monitor turned on and there was a backlight, we can conclude that the power and inverter board is working. Therefore, I decided to reflash the monitor first. To do this, we solder the memory chip on the control board.

We insert it into the programmer. I am using the EZP2010 programmer. A very good programmer for the price,

In the programmer program, press the "Detect" button. If the flash drive is working and is determined, click "OK".

Press the "Read" button. When the contents of the flash drive have been read, click “Save” to save the old firmware just in case.

We name the name of the old firmware file and click “Save”.

Now we press the “Load” button and select the previously downloaded working firmware and press the “Auto” button (the microcircuit will be automatically formatted, flashed and verified).

We solder the memory chip (flash drive) back to the board.

We screw the boards back into the basket and assemble the monitor for testing.

But, unfortunately, the problem was not with the firmware and the problem remained.

In this situation, I assumed that the malfunction is either in the processor or in the matrix itself. Therefore, I started studying the theoretical part, the scheme, reading the forums. After rereading a lot of information, I eventually found the answer to the solution to this problem. This monitor uses an HT185WX1-501-CCFL matrix, which has a typical fault - an open in the MLG signal line.

Let's start restoring this line. We take a thin wire and solder one end of it to the MLG contact area on the matrix board.

We solder the other end of the wire to the second contact pad on a small cable of the matrix, which is located on the side and goes into the matrix itself. Tinning the contact and soldering the wire must be very careful, because this cable is very thin.

The LCD monitor Samsung S20A300N came to me in a non-working condition. An acquaintance of mine tried to start it, but since there was no power supply for it, he powered it from the 12 volt line of the computer power supply. He says that he observed the polarity. However, the monitor did not work, moreover, it smelled of burning and smoke soon poured out. happens.

I took it for a complete disassembly, at the same time we'll see - maybe it will be possible to revive it?

I will not describe the monitor itself - it is already described. On the back there is a Samsung logo, two connectors - one VGA or D-Sub, and a connector for an external power supply. Samsung, in order to cut off strangers, made a connector for an external power supply unit not standard. such a trick.

The label on the rear panel is tailored for the Kazakhstani market - all inscriptions are in Russian and Kazakh languages: Samsung logo, model name S20A300N, type LS20A300, model code LS20A300NS / KZ.Power source: direct current 14V and 2.14A (on the case near the connector it is indicated a little differently - DC 12V / 14V, that is, 12 volts should be suitable). Further, equipment of the III class. Date of manufacture - 2011.11. Made in Russia by Samsung Electronics Rus Kaluga LLC. Serial number and barcode.

When disassembling the Samsung S20A300N monitor, one should take into account that there are not a single screw, everything is kept only on the latches. Therefore, in order to maintain the appearance, you need to be careful. Removing the top cover, we see only two boards: a small one - the main one and a very small one - a board for control buttons (we are not considering the matrix now).

+ Click on the picture to enlarge!

The following are connected to the system or main board: control board, display matrix - through a loop, and LED backlight.

On the board we see a large chip - a processor signed by Samsung MagicColor SE1059LMHL-NT 1138-BB. Next to it is a crystal oscillator. Microcircuits? Winbond 25X40BVSIG is a flash memory chip, another S24CS0 flash memory. The microcircuit, the new marking from this manufacturer just infuriates - ATMLH134 02C M B- 1G3199K. The 9997GH transistor in the power regulator.

Part of the board is covered with a steel shield, there is a sticker on the shield: BN94-04264L P002 (P02). barcode. You can see a place for the DVI input connector on the screen, but it's not soldered - economy, damn it. So far, we don't see anything bitter on the board.

+ Click on the picture to enlarge!

The screen is soldered, remove it. And immediately we see a burnt out eight-legged microcircuit, it's good that the marking can be read - D9329 and this is “Simple Step-down Switching Regulator with Built-in Power MOSFET” (DC-DC converter 14V> 5V). Well, it burned down - it burned out like that, it makes no sense to change it, who knows what else burned there, though not so effectively? And a new such board in China costs about $ 45.

+ Click on the picture to enlarge!

There are no elements on the reverse side of the board, markings: Model SA300 / SA350, CODE BN41-01592D (2011.04.19), REV NO: MP 1.0, SIZE: 119 × 95 (WL) 1.6T.

This concludes. The matrix and LED backlight are intact, let them lie down for a while - maybe there will be a donor.

The Samsung S23A350H monitor belongs to a new generation of digital monitors with LED backlighting. Assembled a monitor without a single screw. Well, almost without a single one)

Rear wall with connectors

Monitor label and connectors on the rear panel. As you can see from the set of inputs, the monitor has an analog VGA input, digital HDMI and an external power supply.

Rear wall with connectors. Close-up

In order to disassemble the Samsung S23A350H monitor, it is necessary to separate the back wall from the front panel with plastic spatulas with the matrix, control board and main board located on it. The wall is secured with plastic clips. Not a single screw is used in the structure of its fastening.

Latches on the edge of the monitor

This must be done carefully, without the use of metal objects, so as not to spoil the appearance of the device.

When separating the back wall, you need to make sure that the board does not fall out. It is embedded in the guides on the rear wall and has no other attachment.

We release the latches and separate the back wall

It is more convenient to remove the back wall by placing the monitor face down on a soft surface.

Monitor with the back panel removed

In fact, the monitor consists of four parts: a collapsible case, a main board, a matrix and a control board. The parts are connected to each other by loops.

If the rear panel is inaccurately removed, there is a danger of breaking the loops connecting the board with the matrix and the control board.

Loop connecting the board to the matrix

Monitor board marking

It is worth disassembling the monitor in two cases: to repair the main board or to replace the matrix.

And this should be done after checking the performance of the power supply. Repairing the power supply is beyond the scope of this article.

When assembling, pay attention to the position of the main board. Incorrect installation of the main board may damage the matrix. Good luck disassembling)

- Samsung;
- Model: S19A300N
- Model code: LS19A300NS / EN
- Color display unit Type No: LS19A300
The problem is this: it seemed like it worked fine at first, then it started to glitch, what was it:

I took it apart and photographed the insides just in case.

Published on May 26, 2017
DIY SAMSUNG monitor repair. Typical Problem: Step-by-Step Repair
The image blinks or goes blank when the monitor is turned on.
This miracle directly indicates to us a malfunction of the power supply.
Of course, the first step is to check the power and signal cables - they must be securely fastened in the connectors. A blinking image on the monitor tells us that the monitor backlight voltage source is constantly jumping off the operating mode.
The most common reason for this is swollen electrolytic capacitors, microcracks in the solder and a faulty TL431 microcircuit. Swollen capacitors most often cost 820 uF 16 V, they can be replaced with a larger capacity and a higher voltage, for example, the cheapest and most reliable ones are Rubycon 1000 uF 25 V capacitors and Nippon 1500 uF 10 V capacitors. 105 degrees) Samwha 2200 uF 25 V. Everything else will not last long.
#repair #diy #hand #typical #problem step by step #monitor #samsung
DIY SAMSUNG monitor repair. A typical problem: step-by-step repair repairing the monitor repairing the monitor does not turn on with your own hands how it works replacing capacitors re-soldering capacitors replacing the capacitors in the power supply monitor does not turn on well twitching the image on the screen repairing the monitor with your own hands troubleshooting the monitor turning the display on and off monitor repair video capacitors no backlighting sAM capacitors bloated

My monitor sometimes shows an image, and sometimes does not. What could be the problem ? I checked the processor, connected another monitor, everything works fine.

And Che does not open the case with an ax.

For some reason, everyone shows the easiest repairs when the capacitors are swollen. Such a repair can be done by a person who knows how to elementarily solder. You will show how to repair the unit when nothing is outwardly visible and the multimeter shows nothing. That is, a troubleshooting algorithm. And so you only force to spend time on you and there is no benefit from you.

if the monitors continue to stand, they will continue to die. There should be a clear space above the monitor for ventilation. And yes, to disassemble the monitor with a piece of iron, it's just awful. For this there are plastic tools, at worst an unnecessary plastic card, so as not to damage the plastic of the monitor.

Hello, this is the case, the monitor does not respond to buttons other than the on / off button on the screen, the same image of stripes tvclip.biz/video/onhRkiJ13F0/video.html does not exit this mode even after switching off. Thank you

Thank you very much, you are very interested in your teaching talent

and if at the moment the monitor is turned on, a light horizontal stripe with a thickness of 1-2 pixels appears in the middle of the screen, and under it the image floats and shakes, it dies down over time. With what it can be connected?

it all starts with the power supply. and then further ..

if the native unit has an output of 14V, 2.14A, and a unit with an output of 19V, 3.42A is available, then it knocks the monitor or can I connect it with such values?

O T V E R T K A: Home Master's Channel I will check, thanks

Monitors Samsung SyncMaster 940N

A number of the most typical problems in the operation of monitors that sooner or later most computer users have to face are: no signal, problems with image transmission, its complete absence with a power indicator, image color distortion, backlight dimming after a couple of minutes of operation and the appearance this kind of lettering.

As a rule, problems with the monitor arise due to incorrect connection, incorrect settings or malfunctions of the video card. The Samsung SyncMaster 940N monitor, a fairly common model, will serve as an example for eliminating such a problem as the lack of a signal and the correct operation of the power indicator.

In general, this model is distinguished by ease of disassembly, as well as the free access of all the parts necessary for replacement, given that there is no external damage and only internal faults remain, so it is worth trying to carry out the repair yourself.

Before proceeding with the disassembly of the monitor, it is important that after disconnecting from the mains, some time has passed, preferably several hours, and in the meantime, prepare a Phillips screwdriver and prepare enough space for work, for example, a table and cover with a soft cloth.

For disassembly, the monitor is put down with the screen and, in turn, the fixing screws of the legs are unscrewed with a screwdriver, these are three pieces, and the cover is on four screws. There is no need to touch the rubber plugs.

Next, you need to be extremely careful to detach the back panel. Plastic is very fragile and can crack, so that this does not happen, it is worth using a thin and sharp object in the work. A scalpel is fine for this role. By disengaging each of the latches in turn, the lid will gradually open. It is important not to rush and work carefully so that you do not have to fix cracks.

After removing the cover, it is necessary to remove the second protective part of all internal electronics - the chrome plug. There is no particular difficulty here and it will be quite enough to slightly shift it to the side.

The next step is to disconnect all cables and a ribbon cable with side locks. These elements will only get in the way, and then the lid opens easily.

Now, in order to get to the monitor board, it remains to remove the plate and its three fastening bolts. Unscrew the bolts and remove the plate. All the electronic "stuffing" of the monitor is before your eyes and you can find the cause of the malfunction.

In this case, the cause of the breakdown of the Samsung SyncMaster 940N monitor was swollen capacitors, which can be seen with the naked eye, they need to be replaced, which can be provided with soldering tools and proper skill, and the monitor will be ready for use, all that remains is to carefully assemble it without damaging the cable. If you are not confident in your abilities or it is not possible to perform a replacement, contact the repair specialists for help.