820-3662 chimes every 3 seconds

Fizzl92

Member
Hello,
this 820-3662 turns on normally. The board looks fine - no evidence of water. The problem is that it chimes every three seconds as soon as i plug a screen into any port. This happens on the LVDS as well as n the thunderbold port. It also turns backlight on and an external monitor recognizes it permanently (no ""no signal" message) but it´s not showing a image on any screen.I also tried two screens internally and both thunderbold ports - same thing. Without any screen plugged in it chimes only once. I measured all Rails with S0 in their name andt hey are all there. Now i am stuck.
Thanks for any help
 

dukefawks

Administrator
No idea, probably the usual weird 3662 problem that I have no time to figure out. You could try to swap the ROM for testing. Save to old ROM!!
 
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