JDW is correct on what he has said. Most display issues are centralized around analog technology, hence the analog board. If it were a problem centralized with the logic board, you would have had additional artifacts (pixelation, etc.) associated with the main problem. The SE/30, and all compact Macs of that era for that matter, were only digital on the logic board. The remainder of the machine is analog, from the power supply to the CRT.

I would get some pics and post them here to verify the diagnosis of an analog board issue.

73s de Phreakout. :rambo: