820 00840 shutting down

LetsFix

Member
this one came, with a very weird issue...it would turn on, then after a minute or so, would freeze and keeps the cpu heating up, while no video or usb activity meaning braindead...after that i took the board out of the case, and found C7701 knocked down, so i replaced it. i put everything back together and then i noticed that now, it would turn on, i can click on the trackpad, but soon after shutdown outta nowhere, i cant click. dunno where to start on this one...
 

2informaticos

Administrator
Staff member
Did you test the board outside?
Use USB-C hub for HDMI output and USB macOS for test.
Checfor other knocked off components.
Do you get all voltages, including VCORE?
 

LetsFix

Member
yes board tested outside, same result.

i checked no video anywhere.

i throughly checked the board but i cant find anything else...

when its on, i get all voltages, but since shuts down after a few seconds...
 

LetsFix

Member
well, i put it outta the case, and it turned on. booted to osx, and get a kernel panic -spinlock acquisition timed out-, after that it shut down with a black screen...so i guess this is a RAM issue?, or what else can cause this?

if its ram, its worth fixing? where would i get the ram chips for this? or the stencil? i got some spare boards that i could take them off...i mean i think they are underfilled and they cant be reflowed to test at least...
 
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