Remove audio board and inspect for liquid sign.
Be aware of touch ID, may be affected too.
Be aware of touch ID, may be affected too.
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820-01521-A with liquid damage but no corrosion starts with 5V then turns and stuck at 12V
- Thread starter MeTech Turkey
- Start date
MeTech Turkey
Member
we have found out that R0211 and C0255 has been corrupted by corrosion. So do you think changing these will sort out the problem?
but no short on diode mode. It shows 715 on diode mode
but no short on diode mode. It shows 715 on diode mode
Last edited:
MeTech Turkey
Member
I have just found out that when I plug in the battery connector which is J6950 then starting voltage stucks at 5V but without battery connector plugged in it starts with 5V then jumps to 12V and stays there
"R0211 and C0255"
I can't find any in the schematic...
Battery possibly affected by liquid spill.
NLBA1 can help you to diagnose the battery.
www.laptopu.ro
I can't find any in the schematic...
Battery possibly affected by liquid spill.
NLBA1 can help you to diagnose the battery.
NLBA1 Laptop Battery Analyzer and Repair Tool - NIP Embedded Systems
Professional equipment to test, analyze and repair laptop batteries. Our product can charge, discharge, calibrate and reset laptop battery chips.
www.laptopu.ro
MeTech Turkey
Member
R0211 and C0255 is on audio board not on the mainboard.I have changed the U7000 but now I found out that under the thermal camera U7800 flashes on some point and I guess it belongs to PP3V3_G3H line where it flashes. When it flashes it went down to 0 and back to 0.1A again. It starts with 5V then goes up to 12V but on 12V stays but it jumps down to 0.00 from 0.100A I ralised that on PP3V3_G3H line it goes up to 3.3V but then jumps down to 0-1V then back to 3.3 again. And it loops like this. Nothing connected to the mainboard.
Any suggestions?
Any suggestions?
Liquid spill on audio board, usually damage T2 on this board.
You should compare diode mode readings on J6100 with known good board.
At least check if any short there...
You should compare diode mode readings on J6100 with known good board.
At least check if any short there...
MeTech Turkey
Member
so if it is t2? what should I follow? changing t2 with a new one will sort problem out? Or do I need to do anything if I change t2?
Changing T2 will lose fingerprint functionality.
Several times I found T2 damaged on SPKRAMP_RESET_L line (internal short).
This line is next to PPBUS_G3H on J6100 and audio board connector too.
Several times I found T2 damaged on SPKRAMP_RESET_L line (internal short).
This line is next to PPBUS_G3H on J6100 and audio board connector too.