Remove liquid inside laptop cpu socket S1 AMD

[Francisco.s]

Re: Remove liquid inside laptop cpu socket S1 AMD

Removed northbridge/gpu ATI 216-0752001 RS880 but short remains on +VDDNBP rail. Can anyone confirm that +VDDNBP power rail is the same with +VDDNB on page 38 of schematics that uploaded earlier??

I think that the shorted capacitor must be on page 8, bottom left, one of C42, C43 or C49 but cannot locate those cause there is no numbering on the board for most of the capacitors...
Will try what Atsio mentioned in earlier post.

As you can see, (page 32) +VDDNBP = +VDDNB.

[Dimitrios]

Re: Remove liquid inside laptop cpu socket S1 AMD

You are right! How did I miss this?? Thought it was the same!

Well I am also getting a short 70 Ohm on 1.1VS voltage L13 and L14 so I guess that it's over... I wish I had a regulated lab voltage supply to inject low voltage. Will do in the future but too many shorted components...

[momaka]

Re: Remove liquid inside laptop cpu socket S1 AMD

You are right! How did I miss this?? Thought it was the same!

Well I am also getting a short 70 Ohm on 1.1VS voltage L13 and L14 so I guess that it's over... I wish I had a regulated lab voltage supply to inject low voltage. Will do in the future but too many shorted components...

Well, if you are "writting off" the board, you might as well inject some low voltage and see what gives (take out the RAM, CPU, and anything else valuable before trying, of course).

I also thought about making a simple and crude current-controlled source, but I haven't tested it yet. Basically, just a big BJT (TO-220 or bigger) attached to a good-sized heatsink, driven by a potentiometer. Since for BJTs, the C-E current is roughly propertional to the B-E current, you should get pretty decent control of the current, IMO. Like I said, though, I haven't tested it.