2019. március 22., péntek


LG Optimus L9 P760 digitizer replacing guide

Írta: | Kulcsszavak: lg . l9 . p760 . digitizer . replacement . disassembly . teardown


As I didn't found any description for disassemble an LG L9, but I had to replace the digitizer / front cover of my phone, I decided to write one. For those, who do not speak hungarian, here's the english version :)

In my case after a short jump, my phone fell out of my pocket, straight to the sidewalk. Fortunately only the digitizer cracked, the screen remained intact.

I got the replacement part from eBay, it got here (Hungary) from China in a little more than 2 weeks, and costs 40 USD, with tracking, tools and shipping. Compared to the official T-Mobile price of about 90 USD plus repair fees it was really reasonable. Of course this voids warranty, if they find out this homebrew repair, so be careful.

Please remember that I am not responsible for any damage of your phone, do this for your own risk.

Photos are clickable, and made by a Nokia N9, so they won't be over-the-top quality, but will do

This was the initial state

The replacement part and the tools.

The three screwdrivers are absolutely useless, as one of them is too pointy to grip the screw, and there are no screws in the phone for the other two. On the other hand the blue "crowbar" will become really handy in disassembling the plastic case

First of all turn off the phone and remove the back cover, the battery, the SIM and microSD cards.

Remove the 10 screws, marked with red circles, that holds the inner backplate.

Then pry down the backplate with the previously mentioned opening tool


In the next step detach the 5 ribbon cables and the WiFi antenna's cable from the PCB, marked with red circles in the picture.

The black box, marked with a green circle is the speaker. It is glued into it's place, but it can be removed by gently but firmly moves.
Mod: it's much easier and safer if you just remove the screw just left to the speaker, and remove the whole thing with the main PCB.

Detached ribboncables

After this the PCB can be easily removed. Watch out for the side button's microswitches and the buttons themselves, as they aren't fixed to anything, and can be easily lost.

The removed PCB and here we can also see the glue on the bottom of the speaker.

Remove the socket of the speaker, and the small plastic part, which holds the microUSB port on the bottom of the phone.

Remove the small rubber parts, marked with red circles. These protects the microphones and the proximity and lightsensors.

The next step is to remove the digitizer. The method is the same as it was with the backplate.

The controlchip of the digitizer can be pulled through the place of the removed speakersocket.

Keep in mind that the screen isn't fixed to anywhere, the digitizer holds it in place, so be careful when removing it.

After that, replace the broken digitizer with a new one and assemble the phone. The steps are the same as disassembling, only backwards.
Don't forget to remove the protective cover of the replacement from both sides, and after that be careful not to leave fingerprints on the inner side of it. As I did :(((

A small interesting thing is the Apple logo on the chip of the digitizer, it wasn't there on the original part.

It's important, that the Home button is not part of the digitizer, so don't forget to take it from the old one, like I did...

... and so it's done!

I hope that nobody will need this guide, but if anyone will, feel free to use it :)

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