i'm guessing a CPU mosfet or cap in that area is shorted. Is PPBUS_G3H a steady 8.5v now? Is the machine in an S0 state, meaning S0 rails are present?
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820-3023 green light, warm cpu
- Thread starter samiam
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g3h is steady now, yes def in S0 state
getting 5.17V on PP5V_S0_CPU_VCCIO probe 371
you even hear the board make a super faint little power squeak as it tries to turn on
not getting the 1.5V on PM_MEM_PWRGD probe 379
you think it's Q2820 shorting it to ground? or something else. not really any caps in that area, just a whole bunch of mosfet gates
getting 5.17V on PP5V_S0_CPU_VCCIO probe 371
you even hear the board make a super faint little power squeak as it tries to turn on
not getting the 1.5V on PM_MEM_PWRGD probe 379
you think it's Q2820 shorting it to ground? or something else. not really any caps in that area, just a whole bunch of mosfet gates
Let's look at this logically. Q2820 is going to short PM_MEM_PWRGD to ground if voltage on pin 2 is too high.
So what is PM_MEM_PWRGD_L measuring? This means PM_MEM_PWRGD is present when the signal is LOW, so when it's HIGH it will short it to ground.
So what is PM_MEM_PWRGD_L measuring? This means PM_MEM_PWRGD is present when the signal is LOW, so when it's HIGH it will short it to ground.