820-3208
Had powered USB device inserted, now does not turn on. No liquid damage, no burnt components that i can see
green light present, goes to orange.
CPU stays cold, PCH U1800 gets warm.
PPBUS_G3H = 8.34v
PPBUS_S5_HS_COMPUTING_ISNS = 8.38v
PPBUS_S5_HS_OTHER_ISNS 8.36v
PPVRTC_G3H = 3.3v
PP5V_S5 = 5.13v
PP3V3_S5 = 3.3v
PP3V3_S4 = 3.3v
S5_PWRGD = 3.4v
PM_SLP_S4_L = 3.3v
P5VS3_EN = 3.3v
PP5V_S3 = 5.1v
PP3V3_S3 = 3.3v
PP5V_S0 = 5.12v
PP3V3_S0 3.3v
PP1V8_S0 1.797v
PP1V5_S0 = 1.5v
PM_SLP_S3_L=3.3v
ALL_SYS_PWRGD=0.04v
Q7950 ALL_SYS_PWRGD=0.04v
pin1 0.741v
pin3 0.093v
pin4 0.04v
pin5 0.7v
pin6 0.131v
pin7 0.77v
CPUVCCIOS0_PGOOD= 0.05v
U7600
CPUVCCIOS0_PGOOD= 0.05v
pin13/14 = 5.1v
pin3 = 3.2v
pin10=1.05v
PP0V75_S0_DDRVTT= 0v
MEMVTT_EN = 0v
PM_SLP_S3_L=3.3v
R2810 - pin1 3.3v pin 2 0v (measures fine at 10k)
Q2810
pin 5 PLT_RESET_L = 0v
pin 2 & 3 = 5v
So i am missing:
CPUVCCIOS0_PGOOD
PLT_RESET_L
ALL_SYS_PWRGD
MEMVTT_EN
PM_S0_PGOOD
Wen to go look back at USB looked at U2600
VCC 3.3v
U4600
pins 3 & 2 = 5v
pin4 = 3.3v
pin5 = 0v
pin7= 0v
pin8 (unconnected but)=0.5v
pin9= 0v
pin10= 3.3v
The fact the PCH is getting warm makes me think it is dead / shorted, but i can't see any burnt or damaged components.
I've failed in trying to work out which one of the missing rails should come first. I suspect that PLT_RESET_L is the big problem.
Would appreciate any suggestions before moving on ?
Had powered USB device inserted, now does not turn on. No liquid damage, no burnt components that i can see
green light present, goes to orange.
CPU stays cold, PCH U1800 gets warm.
PPBUS_G3H = 8.34v
PPBUS_S5_HS_COMPUTING_ISNS = 8.38v
PPBUS_S5_HS_OTHER_ISNS 8.36v
PPVRTC_G3H = 3.3v
PP5V_S5 = 5.13v
PP3V3_S5 = 3.3v
PP3V3_S4 = 3.3v
S5_PWRGD = 3.4v
PM_SLP_S4_L = 3.3v
P5VS3_EN = 3.3v
PP5V_S3 = 5.1v
PP3V3_S3 = 3.3v
PP5V_S0 = 5.12v
PP3V3_S0 3.3v
PP1V8_S0 1.797v
PP1V5_S0 = 1.5v
PM_SLP_S3_L=3.3v
ALL_SYS_PWRGD=0.04v
Q7950 ALL_SYS_PWRGD=0.04v
pin1 0.741v
pin3 0.093v
pin4 0.04v
pin5 0.7v
pin6 0.131v
pin7 0.77v
CPUVCCIOS0_PGOOD= 0.05v
U7600
CPUVCCIOS0_PGOOD= 0.05v
pin13/14 = 5.1v
pin3 = 3.2v
pin10=1.05v
PP0V75_S0_DDRVTT= 0v
MEMVTT_EN = 0v
PM_SLP_S3_L=3.3v
R2810 - pin1 3.3v pin 2 0v (measures fine at 10k)
Q2810
pin 5 PLT_RESET_L = 0v
pin 2 & 3 = 5v
So i am missing:
CPUVCCIOS0_PGOOD
PLT_RESET_L
ALL_SYS_PWRGD
MEMVTT_EN
PM_S0_PGOOD
Wen to go look back at USB looked at U2600
VCC 3.3v
U4600
pins 3 & 2 = 5v
pin4 = 3.3v
pin5 = 0v
pin7= 0v
pin8 (unconnected but)=0.5v
pin9= 0v
pin10= 3.3v
The fact the PCH is getting warm makes me think it is dead / shorted, but i can't see any burnt or damaged components.
I've failed in trying to work out which one of the missing rails should come first. I suspect that PLT_RESET_L is the big problem.
Would appreciate any suggestions before moving on ?