820-00850 dying on startup

Revive

Member
Some light corrosion in different areas. C6452 area, replaced all effected caps and resistors and checked around in diode for any stray shorts, also corrosion at C5101 area replaced all effected along with J5100.
L8504 exploded and carbonized, replaced.
A spot of damage at the LCD end of the J8500 connector, normally I would think this brain dead but as far as I can tell by the way the damage looks the short was between just pin 2 and 44, is it safe to assume U5250 would take the hit and not the CPU?
When plugged in it climbs up to 19.9V .72 amps and I get .88V on CPUCORE_SW1 and CPUCORE_SW2 briefly, then it goes down to 20v .01amp and it loses power.
Is this a dead CPU. Any idea what to look at first here?

IMG_2199.jpg
 

2informaticos

Administrator
Staff member
CPU EDP (Embedded Display Port) lines are directly connected to J8500.
There is no protection against spikes from backlight output, in case of liquid spill.
So dead CPU...
 
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