I got an 820-3662 board in today that would not power on. There was no liquid, and no drop damage evident.
PPBUS_G3H was .60v, and there was a short present on PPBUS. I removed F7140/F7141 and injected voltage into PPBUS. I finally noticed U7310 getting warm (S5_HS_COMPUTING_ISNS). I removed it, and the short was gone. I replaced it, and the short was still gone, and the board powered on. I put the board into a test-case, and the board powers on but does not chime. Light on a mouse works, so there's VCORE, but no other activity. CPU feels cold the whole time, and there's no sign of life on the LCD (it doesn't activate and there's of course no backlight or anything). No life other than fans spinning.
U7310 being shorted has me somewhat hopeless, but is it possible the CPU is NOT dead? Right now I'm pretty sure it is.
Any help appreciated!
PPBUS_G3H was .60v, and there was a short present on PPBUS. I removed F7140/F7141 and injected voltage into PPBUS. I finally noticed U7310 getting warm (S5_HS_COMPUTING_ISNS). I removed it, and the short was gone. I replaced it, and the short was still gone, and the board powered on. I put the board into a test-case, and the board powers on but does not chime. Light on a mouse works, so there's VCORE, but no other activity. CPU feels cold the whole time, and there's no sign of life on the LCD (it doesn't activate and there's of course no backlight or anything). No life other than fans spinning.
U7310 being shorted has me somewhat hopeless, but is it possible the CPU is NOT dead? Right now I'm pretty sure it is.
Any help appreciated!
