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820 00165 No Power

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  • #16
    L3095 Ov
    L7130 8.58v
    L7520 0v
    L7560 3.347v
    L7430 0v
    L7630 0v
    L7310 0v
    L7320 0v

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    • #17
      At least L7520 must get 5V, if fan spins!
      So check voltages in these 2 seconds...

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      • #18
        L7520 is not getting 5v, for those 2 seconds that the fan spins, I get a different voltage each time it comes on anywhere between .855-4.3v

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        • #19
          So L7520 pulses; you can see 5V with o-scope, not DC multimeter.
          Check which other coils pulse too...
          Also check if ALL_SYS_PWRGD pulsing?

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          • #20
            ALL_SYS_PWRGD does not seem to be pulsing, unfortunately I do not have an o scope

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            • #21
              A DC multimeter should be good enough.
              You will not catch the nominal voltage expected, but can see if pulse.
              Just toggle SMC_ONOFF_L repeatedly...

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              • #22
                I will try again, I know sometimes it takes a few trys, but I literally connected and wiggled those pads probably 50 times the other day.

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                • #23
                  Solder a wire on SMC_ONOFF_L pad and touch the ground (any metal plate of chassis), to simulate power button...

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                  • #24
                    I have tried to short the pads with multiple tools, have soldered a wire, nothing is happening toggling SMC_ONOFF

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                    • #25
                      Check for pulse on all PM_SLP_Sx_L signals.
                      Strange to get pulsing only L7520...

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