Minor liquid damage.
Fan spins for a couple of seconds then repeats.
PP5V_S3 jumps from 0.2 to something as fan goes on and off
PP5V_S0 jumps from 0.6 to something as fan goes on and off.
Cannot see anything on either of these lines that is suspicious.
Diode mode PP5V_S3 0.430
Diode mode PP5V_S0 0.389 (matches donor)
Wanted to see if it was the S3 or the S0 causing the issue. Removed Q7860. With Q7860 removed PP5V_S3 is 5v.
Suspected Q7860, replaced it.
Board turned on for 30 seconds with normal fan.
Unplugged, waited and tested again - Back to same problem, quarter fan spin.
Vcore when quarter fan spinning is not coming on.
Begin to suspect U7400 ?
Appreciate any help as always.
Fan spins for a couple of seconds then repeats.
PP5V_S3 jumps from 0.2 to something as fan goes on and off
PP5V_S0 jumps from 0.6 to something as fan goes on and off.
Cannot see anything on either of these lines that is suspicious.
Diode mode PP5V_S3 0.430
Diode mode PP5V_S0 0.389 (matches donor)
Wanted to see if it was the S3 or the S0 causing the issue. Removed Q7860. With Q7860 removed PP5V_S3 is 5v.
Suspected Q7860, replaced it.
Board turned on for 30 seconds with normal fan.
Unplugged, waited and tested again - Back to same problem, quarter fan spin.
Vcore when quarter fan spinning is not coming on.
Begin to suspect U7400 ?
Appreciate any help as always.