820-00045 no power

[shlom]

hello

working on a a1543 820-00045 logicboard
no liquid damage anywhere inside the machine

when connected to charger does not power on, no response to keyboard
trackpad is putting out force touch feedback when connected to the charger but no other sign of life..

pulled out the logicboard and started diagnose
when connecting the charger i get 14.7v on F4700 on both sides
worries me is that cpu and storage area are getting pretty hot (is that normal?)

resistance to ground on F4700 is around 37k ohms on both sides...

any ideas?

 

[shlom]

strange enough
looks like the board is in s0 state, the little led on the bottom is glowing when connected
also, having 1.69v cpu vcore...

but no image on display (connected the display and charger only)
and also no chime on speaker...

this is the first time working on this board
is it suppose to get warm quickly? the 14.7v on f4700 is normal? (on schematic says 20v)

any thoughts will be appreciated..

 

[dukefawks]

Yeah the common brain dead A1534. I have a few here with same symptom. The ones I have here started crashing and shutting down first before being brain dead. I have no idea what is wrong with them, possibly RAM. No solution at this time.