Received an iPhone 8 Plus with serious damage and after checking we need to fix the cracked motherboard to solve the problem. Let’s see how the miracle happens.
Model: iPhone 8 Plus
- Announced 2017, September 12
- Released 2017, September 22
Defect phenomenon
The iPhone 8 Plus was seriously drop damaged and caused many defects
- Screen is cracked
- Back glass cover is cracked
- No voice when making a phone call or using a voice memo
- Wi-Fi can turn on but cannot search the signals
Troubleshooting
- The screen display and touch function work fine, instead of replacing the screen with a new one, we can refurb the screen to save some money for the client
- for the back glass, replacing a new one is OK.
- No voice when making phone calls or using the voice memo is caused by the dock flex cable damage. The microphone issue can be resolved by replacing a new backglass cover with parts installed.
- The Wi-Fi signal issue is caused by the motherboard damage, we need to fix the motherboard
Repair Process
Take out the motherboard from the phone case, and find the corner of the motherboard is cracked.
Temporarily stick the cracked part with the motherboard by the UV mask first
Then refer to the bitmap to have a check, on the cracked part with some antennas connected. It should be the reason for the Wi-Fi signal weak issue.
Luckily, the cracked part can be fixed by jumping wire.
Side A
then jump wire as below
After jumping the wire apply with the UV mask, then cure it with the UV lamp
Side B
Refer to the bitmap and fix the other side. Two wires should be jumped, then cure with the UV lamp.
Apply a little bit more of the UV mask to the cracked part
Cure with the UV lamp again to enhance the bonding
Repair Result
Put the motherboard into the new rear phone case with the new speaker, new flex cable, etc. installed, Assemble the refurbished screen, and power on to test, all the functions back to normal.
The Wi-Fi signal can be searched and well connected.
The microphone on the bottom also works fine, can use the voice memo to record the voice
