Macintosh SE/30 no Display

[bibilit]

Logic board issue for sure, new caps, I have a chime but screen remains black. 

Ls166 replaced, traces checked around but have not found so far. 

Any idea ? 

With another logic board, screen is ok. 

 

[bibilit]

Trying to figured out...better but not over. 

After replacing UG8, screen lit up, and had a display (sort of) but UE8 was bad also, after replacing this also, the display improved, but was very dark. 

I patched a trace, and now have this screen. 

The more i use it the worse it is. 

Sound is present and board is working (can boot from a hard drive) but after a while screen is really corrupted. 

Any idea ? As I have been spending hours already looking for broken traces. 

 

[bibilit]

In the end my new LS 166 was faulty. 

After removing and replacing the F 253s I get back to the LS and removed one from a damaged board, worked perfectly.