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820-4924 no power
- Thread starter Kyle93
- Start date
ALL_SYS_PWRGD must come high, before CPU core voltage appears.
Remove Q8150 and test again.
NO.
You can throw it, is a redundant protection.
The problem comes from the resistor dividers placed on its inputs; considering the corresponding power supplies are good.
You can throw it, is a redundant protection.
The problem comes from the resistor dividers placed on its inputs; considering the corresponding power supplies are good.
Board stays on now, but no activity?
Do you get stable CPU core voltage?
Do you get stable CPU core voltage?
CPU core doesn't drop on these boards, like in new ones.
Check U1950 pin 3 voltage.
PLT_RESET_L comes high?
Check U1950 pin 3 voltage.
PLT_RESET_L comes high?
Then check pins 1, 2, 5 & 6.
So missing ALL_SYS_PWRGD and bad 3V3_S0 voltage.
Which coils get voltage on the board?
Which coils get voltage on the board?
"PP1V05_S0_REG_R 1.055V
PPVCC_S0_CPU 1.7V"
Impossible, if no 5V_S3 present.
"L7520 0V"
PPVCC_S0_CPU 1.7V"
Impossible, if no 5V_S3 present.
"L7520 0V"
Do you get 3V3_SUS?
Trigger SMC_ONOFF_L and check for pulse at L7520.