Hey All,
Looking at the boardview and schematic provided in the request section for this board. I have been trying to wrap my head around the powerup cycle of this laptop.
Digging through and testing using the provided information has led me to a lack of +VCC_CORE that is preventing startup. It looks like +Vcc_Core is supplied by D2/S1 of PQZ1 which is closed by D1 of PQZ1. Am I missing something?
When testing for the presence of +19VB_CPU i was testing all the boardview callouts for it which lead me to PQA1 pins 2,3,4. Pins 2 and 3 show 19v, however, pin 4 does not show 19v and actually arced when i probed it. unfortunately i do not have an inspection camera to see the pins yet.
What would be the next step of diag?
MOD Edit: Link to Schematic & Boardview - https://www.badcaps.net/forum/showthread.php?t=122136
.
Looking at the boardview and schematic provided in the request section for this board. I have been trying to wrap my head around the powerup cycle of this laptop.
Digging through and testing using the provided information has led me to a lack of +VCC_CORE that is preventing startup. It looks like +Vcc_Core is supplied by D2/S1 of PQZ1 which is closed by D1 of PQZ1. Am I missing something?
When testing for the presence of +19VB_CPU i was testing all the boardview callouts for it which lead me to PQA1 pins 2,3,4. Pins 2 and 3 show 19v, however, pin 4 does not show 19v and actually arced when i probed it. unfortunately i do not have an inspection camera to see the pins yet.
What would be the next step of diag?
MOD Edit: Link to Schematic & Boardview - https://www.badcaps.net/forum/showthread.php?t=122136
.
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