Dell Inspiron No Power SHORT

[m4a2t0t]

Dell Inspiron
Reg Model P25F
DPN PGMYp A02

Mobo qcl00 la-8241p rev 1.0 a00

Immediately after plugging in power the LED on the power brick shuts off. P-channel FET PQ101 (alpha omega 4409 https://cdn.badcaps-static.com/pdfs/...ddc92bc03e.pdf) was shorted from when measuring across drain-source (all pins). I replaced the FET and the light on the LED stayed lit for a second then I smelled magic smoke. Tested FET and it was shorted. It has an internal diode across the drain-source which is what I am guessing is shorting.

How do I figure out what is causing the short?






Any help is much appreciated.Thanks

[ktmmotocross]

Re: Dell Inspiron No Power SHORT

inject voltage

[m4a2t0t]

Re: Dell Inspiron No Power SHORT

Not sure what you mean

[subroto]

Re: Dell Inspiron No Power SHORT

start removing tiny non-polar capacitor to find out short one of charging section.

[m4a2t0t]

Re: Dell Inspiron No Power SHORT

So, I found one that was shorted but how do I determine what value it was supposed to be?

[gcomputers]

Re: Dell Inspiron No Power SHORT

So, I found one that was shorted but how do I determine what value it was supposed to be?

remove it and check it will start without this cap.