820-2936 Green light, quarter fan spin.

[JohnB8812]

I'm honestly thinking Ultrasonic this and go from there

 

[dukefawks]

It could be anything. If R7402 is good and you also get CPU Vcore pulsing then it can be corrosion pretty much anywhere. But what is the deal with the "works on battery" thing you said earlier?

 

[JohnB8812]

Ok I'm gonna have to inspect closer then. I'm prob gonna replace backlight fuse since it exploded and then ultrasonic this and see what happens from there.

On the works on battery part, I actually had the machine work off of the battery when working on the ISL6259 area, but it wouldn't charge the battery at all prob from crappy soldering. When I touched that up, I stabilized PPBUS and the battery does charge now, but it won't run off the battery I'm kinda back where I started minus the clock chip.

 

[JohnB8812]

Speaking of that, the backlight fuse pads are completely burned off the board from where it exploded. It almost looks like there's a hole where the fuse was. If that's the case, is this a time waster at that point?

 

[JohnB8812]

Ok so update, pads not missing and no hole. It was just unbelievablely nasty by the fuse so after about 10 minutes of cleaning. I have the pads clean and I soldered a new fuse. I’m gonna run this through the ultrasonic and go from there. If there is indeed corrosion I can’t see, I would think this may help