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No Title 1) what does pin 8 of U1950 look like under a microscope? Not bad as far as I can tell, getting 3.39v. I added a pic. (my microscope is crap) 2) Is PPVRTC_G3H present when it is unable to turn on? Yes 3) Is PPBUS_G3H present when it is unable to turn on? If it is, is it 12.56v or...

Now I think I'm getting somewhere. no voltage present on Q5480 Pin 2 (PBUSVSENSE_EN) I do have voltage on Q5490 Pin 2 (DCINVSENSE_EN) from what I'm able to figure out, it seems that PBUSVSENSE_EN is generated by the SMC. If that is correct then my root cause must lie with the SMC itself...

PM_SLP_S4_L briefly jumps .3mv then .7mv then sits at .1mv. If this is the pulse you refer to then yes. additional testing: Q7180 Pin3 (CHGR_AGATE_DIV) 6.93v Pin6 (CHGR_SGATE_DIV) 16.29v Is this normal? CHGR_AGATE goes through R7186 then drops to 3.8mV for connection to pin 1 on U7100 (That...

This board is new to me and I'm not really sure where to start troubleshooting. As a side note for background, the laptop was dropped what was described as less than 6 inches causing this issue. This board is mine now, I prefer not to learn on customer boards. It might be obvious but I will...