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Old 12-06-2018, 04:28 AM   #1
alindumitru46
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Default MSI Mpower Z77 Big Bang DrMos burned

Monday night I received this mobo and I tried to do some diagnosis, with the information that it did not start.
Actually it started but it showed error code 55 (memory initialization error) and error code 22 on the debug led.

I found a slight smell of burning and I sensed by touching that the memory warmed up abnormally and the next SFC coil aftre mosfet. After a careful visual inspection, I found an affected DrMOS mosfet, but I do not know how to proceed to check to be sure that only this is bad.
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Old 12-11-2018, 11:03 PM   #2
momaka
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Default Re: MSI Mpower Z77 Big Bang DrMos burned

From your picture, that MOSFET looks like it has a bubble in its case. Definitely looks popped to me.

Hopefully, that's the only bad component. If not, it might blow again.
I suggest using different RAM for testing after replacing the MOSFET (and perhaps a cheap RAM module you don't mind sacrificing, if something goes bad.)

Last edited by momaka; 12-11-2018 at 11:06 PM..
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