820-2936 No vcore

G.Beard

New member
Board badly liquid damaged from J9000 to Q5520.

Parts replaced, traces repaired.
5V S0 = 5V
3V3 S0 = 3V3
1V05 S0 = 1V05

ALL_SYS_PWRGD = missing
R7967 (1) = 3V3 (2) = missing


Any ideas please?
 
Last edited:

2informaticos

Administrator
Staff member
Tell us which secondary coils don't get voltage; leave CPU coils for the moment, check the others.
Any one shorted to ground?
Post Q7950 voltages.
 

G.Beard

New member
ALL_SYS_PWRGD now = 1.69V
Still no vcore

No shorts on any chokes
Expected voltages on all other chokes but L7100, L7550, L7510, L7520 = 0V
 

G.Beard

New member
Can anyone tell me what CPUIMVP_TON voltage at pin 2 of U7400 should be please?... Currently 0.5V
 

2informaticos

Administrator
Staff member
ALL_SYS_PWRGD still too low, should be 3V.
Strange to have 0.5V at TON, as that is the correct voltage when CPU power supply works...
Get correct ALL_SYS_PWRGD first.
 
Top