Hi, Some weeks ago I recieved a dead mini itx board. It had the audio connector (the one in wich you plug the audio jack, not the internal audio connector) Cutted! The audio input jack was not there because some guy just cutted it, he told me that after cutting it, It won´t power up again, so I replaced the audio connector with a new one thinking that, that would solve the problem. I did continuity tests and everything is ok on the audio connector. But still doesn´t power up at all
All I get is a green light and when I try to power it up, the case fans attempt to spin for less than half a second. If I try again, they don´t do a thing. If I remove the power cord for some minutes and try again, they attempt to spin again the same way
Could it be a bad mosfet? Capacitors are not blown up, I guess that tells me they´re alright.
The thing is that I have no idea on how to test this mosfets.. I have some experience testing mosfets, but I have only tested PSU mosfets. You know, those big mosfets, you can desolder them easily and test, but In a motherboard they are all soldered smd and they are so hard to desolder so I don´t really know If I have to take them out to make some testing.
I mean... there are a lot of mosfets, I don´t really want to guess wich one it´s the bad one. Is there any way to know wich one is the bad one before desoldering? how can I test them?
What else could be the problem?
Also I want to say that I have checked the board for scratches or blown smd´s and I didn´t found any sign.
Thanks