820-00426 Bootloop on loading

[PhilipC]

Machine cam in no boot with bloated battery, one of the PPVIN_S5_HS_COMPUTING_ISNS capacitors was shorted took it off.

Machine now boots but when loading macos about 1/8th of the bar is just restarts

Also are there any brd available for this? Board looks clean no liquid damage

 

[JohnB8812]

Tried another battery?? Usually bad battery especially if bloated...

 

[PhilipC]

I'm waiting for a battery, but I am testing it without battery for the time being
Have tested it with the bloated battery but same results

 

[JohnB8812]

Yeah these need a battery to boot I'm pretty sure, so I would bet bad battery/lack of battery being plugged in.

 

[PhilipC]

I normally work on older machines which work fine without batteries, thank I'll see how it goes with a battery.

 

[2informaticos]

Not usual, but some MacBooks require battery to work correctly.
Is better to discard a battery issue first.
If you have Medusa programmer in your hands, try to clean ME region.

 

[PhilipC]

Tried with new battery same results, the Cpu seems to be getting really hot (too hot to keep my finger on) even when just showing the flashing folder
Reseated heatsink with new thermal paste same results

Just heard of the medusa all I have is a TL866

edit: the cpu only gets hot when the trackpad is plugged in, and it boots without trackpad plugged in will try to find a different trackpad to test

 

[JohnB8812]

That could do it then for sure. Always rule out parts first if possible

 

[PhilipC]

Tested with new trackpad, same resuilts. CPU very hot and shutsdown when loading macos.

If i let the machine boot without trackpad then plug trackpad in i get cursor movement but no click and KB and cpu doesnt get abnormally hot