Asus v550 (s550 mb) mosfet heating up to burn. Cant source a short.
Ok i'm fighting with this board and I don't want to give up because I know its something “simple” and that i'm blinded right now...
- all 3 mosfets were replaced, went from dead to powering up but mosfet heating up quickly up to burning out.
- removed battery, was dead, and unless I am mistaken, no battery attached shouldnt kill a mosfet on the mb.
- no capacitor shorts detected, would have been too easy.
Now the fun part
- if i apply voltage where the battery was, I won't turn on unless I plug the dc power. If I do so, mosfet doesnt overheat, i can unplug DC power and laptop is fine and can be turned off with the button that wouldnt turn it on!
- I have removed the 3rd mosfet (right) to see if it would change the behavior, everything acts the same (overheat on dc, working ok dc + battery voltage)
The O-H ic is the first mosfet (leftmost where it looks burnt but its just flux)
What am I missing. Havent found schematics for this board so far.
This is driving me nuts, thanks to anyone with spare time for this hehe.
- all 3 mosfets were replaced, went from dead to powering up but mosfet heating up quickly up to burning out.
- removed battery, was dead, and unless I am mistaken, no battery attached shouldnt kill a mosfet on the mb.
- no capacitor shorts detected, would have been too easy.
Now the fun part
- if i apply voltage where the battery was, I won't turn on unless I plug the dc power. If I do so, mosfet doesnt overheat, i can unplug DC power and laptop is fine and can be turned off with the button that wouldnt turn it on!
- I have removed the 3rd mosfet (right) to see if it would change the behavior, everything acts the same (overheat on dc, working ok dc + battery voltage)
The O-H ic is the first mosfet (leftmost where it looks burnt but its just flux)
What am I missing. Havent found schematics for this board so far.
This is driving me nuts, thanks to anyone with spare time for this hehe.
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