820-00165 screen blacks out

Hello, I have a Macbook Air where the screens sometimes blacks out, I can see the LCD just powers off every now and then. Already tried to replace the IO board but that did not work. Would it means 3.3 or 5V is dropping sometimes? Any known issues that can cause this problem? Thanks.
 

2informaticos

Administrator
Staff member
Fan still spins in that moment?
If yes, 3/5V rails are good.

SMC_LID steady high?
Backlight and image go off at same time?
External video remains?
 
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