DIY repair lenovo p780

The Lenovo P780 smartphone from a famous Russian company producing modern digital, computer, mobile equipment, Lenovo has gained immense popularity among our population. And of course, like any other device, little troubles often happen with it, which can be eliminated at a service center or you can try it yourself.

The instruction "How to disassemble Lenovo P780" will help you take the first step towards solving the problem of your gadget. However, we advise you to contact the specialists of the “GrandPhone” service center, so as not to make things worse, as the repair of a Lenovo phone after unskilled intervention can significantly increase. Remember all information you use is at your own risk. The author is not responsible for your actions.

Remove the metal battery cover.

We unscrew the bolts along the edges of the case.

We proceed to dismantle the rear of the case. With a flat instrument, it can be a dental spatula or a rigid pick, we release it from the latches on the right side, releasing it down along the perimeter.

From the bottom, move on and snap off the left side of the smartphone body.

The back can now be easily removed and set aside.

We follow on. Now we need to remove the battery. Disconnect the battery connector from the board, unscrew the two bolts that hold it: one at the top and one at the bottom.

We proceed to dismantle the main board. Disconnect the coaxial antenna cable, display and touchscreen flex cable, as shown in the photo below.

We unscrew the two bolts fixing the board.

Unstick the volume buttons, they are held on double-sided tape and turn the board over, as in the picture.

At the bottom, on the back of the board, there is a ribbon cable that goes to the board with system connectors. Disconnect it.

We remove the fee to the side. In principle, this is the end of the analysis.

Now, as promised, I am posting a few photos taken during the replacement of the display module assembly with touch glass on the Lenovo P780. It looked something like this:

And this is our display, which we will install.

But first we have to remove the old broken screen, which adheres very well to double-sided tape around the perimeter of the metal frame. To do this, warm up the display a little with a hair dryer to make it easier to peel off and begin to dismantle it from the bottom. Something like this:

Next, remove the remnants of the tape from the frame, glue a new one around the entire perimeter. Better if it is applied in two layers.

We glue our new module in place and we get a finished working front panel. All that remains is to assemble the device following the same instructions in reverse order.

This is how Lenovo looks after repairs to replace the screen.

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There was some kind of black mass along the contour of the screen. It seems not sticky, i.e. the screen does not stick back to it. When replacing the screen, what is this mass replaced with?

You can use double-sided tape or special silicone glue.

Did you change the touchscreen screen together?

Yes, we are changing the touchscreen along with the display on the p780.

The cable that goes from the display is damaged. Is it possible to change it or will you have to completely change the entire screen

We'll have to change the entire screen completely.

Good evening. I have this question. What is the reason for this behavior of my phone and the reason for the vertical whitish stripes on the screen? Story. I changed the screen for myself along with the tach assembly, but before that I had to purchase a new frame for it with scotch tape around the perimeter.There was no scotch tape on the metal plate itself where the screen fits. It worked well, but when you call someone or turn on the mobile Internet, the phone begins to live its own life (it itself clicks on the menu, it can drop the call, it runs through the menu wherever it pleases) There are no problems through Wi-Fi and just if you click on it, only when calls and mobile internet. After some time, more vertical white translucent stripes appeared. Since there was no black tape on the new frame (in the center on the metal base where the screen fits), I glued it from the old frame but on double-sided tape. There should also be scotch tape around the edges, but I applied b7000 glue in that place, as well as along the edge of the frame where the touch was glued. Could there be a reason in the screen or is it in the hardware itself? And I noticed that in some place the touch has come off the screen, apparently. It's just not possible to call anyone, I don't know whether to change the screen again or take it together with a frame. Thank you.

Hello. It looks like the problem is in the display, fortunately we did not have such problems.

Thanks for the instruction. I bought a new battery on Ali for my old man (bought at the end of November 2013, now the end of June 2017). Desmart has a similar instruction, but there is absolutely no coverage of the moment with the latches. I coped with your instructions without any problems.
It is probably also worth mentioning that when peeling off the battery from the protective cover, you have to be more careful - I bent mine a little and now the back cover of the case at the bottom does not close completely. Fortunately, the cover with the bumper keeps it around the entire perimeter.
I didn't have the seventh bolt - the one near the camera and the volume rocker. Nothing dangles in the phone - either it fell out and got lost during one of the openings of the back cover, or somewhere dead wedged. I hope it will.

I understand that the phone is not new and is rapidly becoming obsolete, but still it is worth adding a moment with disconnecting and connecting the battery connector - I was terribly afraid to break it out along with the contacts on the board, I still don't really understand how I managed to disconnect it and not damage anything ...

Published by Max Loskutoff 5 years ago
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Complete disassembly of Lenovo P780 with photos, which will help you when repairing your smartphone, replacing a broken screen or replacing a "dead" battery.

Remove the rear metal cover under which the battery is located.

Use a Phillips screwdriver to unscrew the bolts around the entire perimeter of the phone.

We proceed to the separation of the rear part of the case, for this we release it with a pick or a spatula from the latches, starting from the top from the right side of the case, going down.

After that, go to the left side of the phone and release it from the latches.

The back can now be easily removed and set aside.

Now we need to remove the battery, for this we disconnect the battery connector from the motherboard, unscrew the two bolts, one at the top, the second at the bottom, which secure the battery.

Now we need to remove the motherboard, for this we disconnect the coaxial antenna cable, then the display and touchscreen cable.

There is only one step left, unscrew two screws in order to remove the motherboard.

Now you need to peel off the volume buttons, which are attached with double-sided tape, then turn the motherboard upside down, as shown in the second photo.

On the back of the motherboard, you need to disconnect the ribbon cable going to the small board with system connectors.

We remove the motherboard and the disassembly of the Lenovo P780 is over.

The next steps need to be done if you need to replace the display assembly with touch glass.

First, we need to remove the broken display, which is attached to the frame with glue. To do this, we take a hair dryer and warm up the display in the lower part, where we will begin to dismantle it.

After you remove the old display, do not forget to peel off the glue from the frame, and then you can glue the new display on it. Apply the glue to the frame in two layers, so it will be more reliable.

Once you glue on the new display, you have a finished display module with a bezel ready to be installed in your phone. You just have to assemble the phone, following the same instructions, only in reverse order.

This is what our Lenovo P780 phone looks like after being repaired to replace a broken display.

Disassembling Lenovo P780 is a time-consuming job that requires accuracy and attention, so do not start disassembling if you are not confident in your abilities!

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The screen crashed on Lenovo P780, so much so that the sensor stopped working, but the LCD remained intact. By the way, a USB OTG cable (USB On-The-Go - on one side a USB socket like in a computer, on the other a mini / micro-USB connector) and a regular USB mouse will help you to pick up data in case of such a malfunction. Connect the mouse to the phone - the cursor appears on the screen and you act.

Despite the integrity of the LCD screen, the author of the article decided to change the assembly as a whole (LCD and sensor), because the sensor in this phone is glued to the LCD screen throughout the entire area, that is, in order to change it, great care is needed when separating and washing the LCD screen from residues glue, as well as glue that was not there. The price of the assembled screen is quite acceptable - about $ 30 on Aliexpress.

The screen was ordered, arrived successfully - let's start repairing.

The battery is "non-removable" here. Of course, it is pulled out, but you need to unscrew a few screws that hold it and disconnect its connector.

Unscrew all visible screws and remove the back cover.

And here we will unscrew everything we see, remove the battery, first disconnecting its connector, then disconnect the two loops on top of the motherboard. One from the end of the device - from the sensor, the other on the side near the battery in the form of a connector - from the LCD screen, disconnect the small RF connector on the little black wire. Now you can remove the motherboard, just carefully - another connector is connected to it from below. Lift the board and disconnect the bottom connector. That's it, now you can remove the board.

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The phone fell into my hands with a breakdown, does not respond to pressing the sensor, the module is broken, the module was replaced with.

a spatula from a set for depilation)))

There are two modules, a lower and an upper one. I disassembled the lower one, there was no sense, but the upper one, as soon as the screw was unscrewed, the connection immediately appeared, but when screwed in it disappears again.

Hello!
Do I understand correctly that there is a radio module at the bottom?
After my fall, my Lenovo P780 began to get poorly connected, the antenna contacts are in order - the service said that the radio module is faulty and needs to be changed. The service is tight with components. Can you tell me where you can order it or what kind of marking it has?

Guys ! Help, I updated my P780 to a whale kata by air, everything seems to be fine, after a couple of three days I offered to update it again, supposedly fixing all the errors, well, I updated and then it started - if before the phone charged every three days, now it barely lives a day. and the main problem is that the connection is very bad, just awful. where on lenovo A820 a complete network, I have one or two sticks showing.and gps also does not work (the location is not determined at all ((((tell me at least something please (of course, except for "throw it the fuck out"))

homemade - hello! These are not bolts, these are cogs.

Please tell me if the antenna wiring is polarized on the contacts)))? I need to replace the antenna cable itself, but I don’t know, or you can put either side))

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