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820-3437-B BIOS crashing

M

macfix

Member
Hello everybody

I m working on 820-3437-B some one worked on it. When come to my desk fan spinning but not chime not mouse led... after rewrite BOIS board turned on for 3-5 time ( screen come back and mouse led on) after few reboot stopped again and turned at start problem . Replaced bios chip 3 time and all the time same issue. ( SMC looking like replaced i cant be sure is it correct SMC).

Any suggestion for solve problem?
 
M

macfix

Member
I have clean me file known good also used before this board and worked without problem. Yes i have original bios file backup.
 
D

dukefawks

Administrator
Something else is reacting to the heat. Put back original file and check all SPI termination resistors. Look for corrosion around U6100 area and pin 8 of U1950.
 
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