[LG Optimus 4X HD] abhi08638:
Hello, Today I will show you how to replace a problematic sim/microsd/volume/power. The reason why they can be fixed together is because they are all on the same PCB that we will be replacing.

I made this guide because I went snowboarding and I dropped my phone in the snow. I tried the rice trick but after that my power button was still dying. I looked up prices for getting a professional to replace it and it was around $60 for a part that costs $10 MAX. So i just bought the part off of ebay and documented my process

EDIT: if the pictures don't show up, just right click and open in new tab for now

EDIT: There is now no need to remove the motherboard to solve this issue

Credits:

http://www.youtube.com/user/RepairsUniverse

and

http://www.youtube.com/user/RuedasLocas

DISCLAIMER: I DO NOT TAKE ANY RESPONSIBILITY IF YOU MANAGE TO MESS UP YOUR DEVICE. TRY AT YOUR OWN RISK.

Prerequisite:

-A brain​

-Spare Sim Card Reader Tray Holder

http://www.ebay.com/itm/New-Hot-Sim...x-Cable-Replacement-for-LG-P880-/301129602162

-Read/Watch all the links below

http://androidforums.com/lg-optimus...us-4x-hd-screen-replacement-repair-guide.html

http://www.youtube.com/watch?v=WFmHFNKY8og

http://www.youtube.com/watch?v=kGD64_g-ssE

After you are done, do it again to make sure you understand it

You can download these pictures from here

https://www.dropbox.com/sh/8kdrxz28aku1x9x/tMsO_WAAuV

Tools I Used:

Small flathead

Small Philipshead

Thin pointy object

Scissors

https://www.dropbox.com/s/p9es5uyfej3jymz/1.jpg

https://www.dropbox.com/s/1evpx5782ei5nen/2.jpg

1) Remove these Screws only because the others are not required

https://www.dropbox.com/s/lub8senef5uhsqa/IMG_20140414_151433.jpg

https://www.dropbox.com/s/3dw6lf5rtqsslut/IMG_20140414_153856.jpg

2) Use the flathead to pry off the cover from the frame

https://www.dropbox.com/s/1nqhr45zzoa4ssf/IMG_20140414_151527.jpg

https://www.dropbox.com/s/a0ladgpn954fpkr/IMG_20140414_151534.jpg

3) Use the flathead to pry off the cover from the frame

https://www.dropbox.com/s/1nqhr45zzoa4ssf/IMG_20140414_151527.jpg

https://www.dropbox.com/s/a0ladgpn954fpkr/IMG_20140414_151534.jpg

4) This is what it should look like

https://www.dropbox.com/s/fzb7wh8jnn4ljwq/IMG_20140414_151604.jpg

https://www.dropbox.com/s/rcbyzvql8uy6p20/IMG_20140414_151627.jpg

5) Remove the silver screw with the philips head and put it in a safe place

https://www.dropbox.com/s/0u1yl88w08y5011/IMG_20140414_151702.jpg

New "easy" method

6) You DO NOT need to remove all the connectors, only the ones in red

https://www.dropbox.com/s/5cgxcq2ocm7fkwi/IMG_20140414_151844 - Copy.jpg

Take note that the electronic above the sim card slot just needs to be peeled off gently, It is NOT a connector but it does rest on top of the PCB.

Also, you'll need to pry off the vibration motor (the circle to the right of the Sim card slot) as it is glued in

7) This is what the PCB looks like when separated from the motherboard

Note: your motherboard will still be in your phone, i just wanted to shop you what both parts look like

https://www.dropbox.com/s/6ysyid9eu2v5jjw/IMG_20140414_152536.jpg

8) Get out your new PCB

https://www.dropbox.com/s/6130c74hcx...414_152619.jpg

If The PCB you ordered did not come with the shielding then follow these steps

Note: Your motherboard should still be in your phone

8.a) Remove the shielding from the back of the original PCB, be careful of the glue to not damage any components

https://www.dropbox.com/s/nfpuwzf3om1ib3s/IMG_20140414_152657.jpg

https://www.dropbox.com/s/73sbx0k32f4x5x4/IMG_20140414_152731.jpg

8.b) Now, put the shielding back onto the motherboard, it should fit into place nicely

https://www.dropbox.com/s/li966nnqujajgog/IMG_20140414_153037.jpg

8.c) Take out your new PCB and connect the connector to the motherboard before, placing it on the shielding

https://www.dropbox.com/s/mn97igyuir7o9q6/IMG_20140414_153154.jpg

Make sure everything is secure

8.d) Take out your new PCB and connect the connector to the motherboard before, placing it on the shielding

https://www.dropbox.com/s/mn97igyuir7o9q6/IMG_20140414_153154.jpg

Make sure everything is secure

Old Method by removing mother board

Procedure:

Follow the steps from the guide here up to Figure 3.4

8.a) After removing the motherboard, remove the following connector

https://www.dropbox.com/s/bsgwmyf6t1djpdb/IMG_20140414_152518.jpg

8.b) Now just pry off the PCB from the motherboard, be weary of the adhesive

https://www.dropbox.com/s/6ysyid9eu2v5jjw/IMG_20140414_152536.jpg

8.c) Get out your new PCB

https://www.dropbox.com/s/6130c74hcxd413x/IMG_20140414_152619.jpg

8.d) Remove the shielding from the back of the original PCB, be careful of the glue to not damage any components

https://www.dropbox.com/s/nfpuwzf3om1ib3s/IMG_20140414_152657.jpg

https://www.dropbox.com/s/73sbx0k32f4x5x4/IMG_20140414_152731.jpg

8.e) Now, put the shielding back onto the motherboard, it should fit into place nicely

https://www.dropbox.com/s/li966nnqujajgog/IMG_20140414_153037.jpg

8.f) Take out your new PCB and connect the connector to the motherboard before, placing it on the shielding

https://www.dropbox.com/s/mn97igyuir7o9q6/IMG_20140414_153154.jpg

Make sure everything is secure

8.g) Slide the motherboard back into place inside the frame

(Make sure not to damage any connectors by safely getting them out of the way BEFORE putting in your motherboard)

https://www.dropbox.com/s/ojvh1vftm6s3qza/IMG_20140414_153415.jpg

https://www.dropbox.com/s/f3k5f1c7qelaq74/IMG_20140414_153420.jpg

9) Reconnect all of the connectors you previously disconnected EXCEPT the volume and power

https://www.dropbox.com/s/v0oyeoaswkd0gb9/IMG_20140414_153602.jpg

10) Now carefully slide in the power and volume buttons into their correct spots

(I used the flathead the push the rockers out of the way to slide in the buttons)

https://www.dropbox.com/s/l94dfverf2ziwl7/IMG_20140414_153832.jpg

Now test the feel of the buttons before putting the Screw back in. (You should hear the tactile feedback)

11) Screw in the screw you removed to get the motherboard out

https://www.dropbox.com/s/3dw6lf5rtqsslut/IMG_20140414_153856.jpg

12) Put the cover back on (do NOT put the screws back in yet) and see if the all the sides close properly

https://www.dropbox.com/s/e4sc0thp8ioi1dn/IMG_20140414_153954.jpg

https://www.dropbox.com/s/wyob0xuxaqkp8ve/IMG_20140414_154002.jpg

https://www.dropbox.com/s/7x46humbisb5lm7/IMG_20140414_154010.jpg

13) Well crap, i have a bump

https://www.dropbox.com/s/3h6mejmug79o8ar/IMG_20140414_154015.jpg

https://www.dropbox.com/s/69w769ubiz03fpk/IMG_20140414_154131.jpg

Time to backtrack and see what is not seated properly

14) After all that is done and is properly fitted, Put in your sim car, micro sd, and battery

(Do NOT put in the screws yet)

https://www.dropbox.com/s/it26v6h7763flzs/IMG_20140414_154143.jpg

15) Now power on and see if it works

https://www.dropbox.com/s/fumzxsuewnqqgn4/IMG_20140414_154158.jpg

(Mine did, I was so happy I could cry!)

16) After it power on, test all your buttons

17)

Test Cases:

Press power button once to see if the screen turns off

Press the power button to see if the Screen wakes up

Press the volume up to see if the volume increases

Press the volume down to see if the volume decreases

Check your sim connectivity, should have bars

Check your micro sd card by going to Setting>Storage>SD Card

Check your cameras

check your sound

If something does not work, backtrack and check all of your connections.

If your power or volume buttons don't work, check the PCB connection. If it still doesn't work, you might have received a defective PCB like I did (My volume buttons didn't work). Contact your seller and ask for a replacement for your defective item (I got mine for free and now everything works).

18) If everything works, NOW screw in your remaining screws and close her up and enjoy your day!

You can download these pictures from here

https://www.dropbox.com/sh/8kdrxz28aku1x9x/tMsO_WAAuV

Don't forget to hit thanks!