I have a video problem on my Model B rev 4. On UHF the characters are a little unstable with a flicker very few seconds, and 4 thin white bands scrolling up the screen. On RGB (assuming my homebrew cable is wired up correctly), the screen is mostly black, with an occasional flash of text. Seems to be the same on all video modes. I have just replaced the X1 crystal, but not had a chance to check the sync signals with a scope. It gets slightly more stable when left on for a few minutes.
Searching through previous posts seem to point the finger at the 6845 video IC as a likely culprit. While sourcing a replacement, are there any other bits of hardware I should order up as spares for future trouble shooting?
Searching through previous posts seem to point the finger at the 6845 video IC as a likely culprit. While sourcing a replacement, are there any other bits of hardware I should order up as spares for future trouble shooting?
Statistics: Posted by AlSpider — Sat Nov 23, 2024 12:14 pm