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I have here an A1989 where the left USB-C ports are not recogizing any peripherals - charging is working - right side no issues.
Could it be that the THB IC is damaged or corroded? (Should I reflow the IC?)
Note: The MacBook was water damaged in that area, (U3200 was bad)
PPBUS_G3H is looping between 12.25 and 12.57V on an A1989 (820-00850).
Also the output of the USB-C ports are weird.
I assume the CD3215s are fine because I get 20V, right?
What should I check next?
I have here an A1989 with no image/no backlight.
- External display shows image - so the internal GPU is working fine.
- " EDP_INT_AUX_N " = 0.007 (diode mode) / 3.4ohms to ground - Is the CPU bad?
- Heat shield on LCD getting warm (IMG_0615.jpg)
I have here an A2159 (820-01598) which was water damaged. (I took pictures before cleaning - please check the attachments)
After removing/replacing the broken stuff (caps, 94AGTJIELC180) and cleaning the corrotion the device booted fine .... it also worked for 2 whole days.
I can successfully restore the BridgeOS (T2) via DFU mode but still no image on the screen, the S0 power rails are (kinda) present. I don’t think that’s a backlight issue because I have checked it with a flashlight still can’t see anything on the screen.
- PP5V_S0_BKLT_D = 5V