Sony Vaio VGN-FS Dead no power

[fabiog]

I´ve heard that Sony can be a pain to work with but I have one at the moment no power leds nothing.
Does not work off battery or AC
I,ve checked the battery chip MAX1909 and it seems fine
Dcin=19 ,LDO=5.42,ACIN=2.28,ACOK=0V
The power chip MAX1999 isnt getting nor outputting any power at all since V+ is at 0V.
PQ51 S to GD=19.79, G-GD=10v, D-GD=19.79v
PQ50 S to GD=19.79, G-GD=19.79v, D-GD=0.05v ,so something seems to be causing PQ 50 from having 19v and supplying rest of system but i havent been able to figure it out.

Any help appreciated ,Thanks

[fabiog]

Re: Sony Vaio VGN-FS Dead no power

In the area of PD39 and PQ69 on page 32 there was a tiny ceramic cap that when touched would give off a sharp sting or shock so I replaced it, now the shock is gone but my problem still exists.

[fabiog]

Re: Sony Vaio VGN-FS Dead no power

I found that PQ79 seems to be shorted and it's a FDS6676S ,I have an Acer with FDS6690AS and not sure if it's compatible they both are N channel.

[fabiog]

Re: Sony Vaio VGN-FS Dead no power

I did the swap but still get 5.2 ohms on source to drain with new one but then again when I removed them from board FDS6676S showed 5.2 and FDS6690AS was over 100.