First post, by appiah4
- Rank
- l33t++
A friend sent me their VLB VGA card that started exhibiting a strange issue. The card in question works fine in text modes, but in graphics modes it has strage bars and squares missing on the screen. Please see below for some examples:
The card is not exactly in immaculate condition, it has obviously been previously stored unprotected in a box or somet such, it has quite a few scratches and some corrosion. I'm guessing it's either a memory chip gone bad, a corroded via or a memory trace that got scratched.. Before I pick up a multimeter and start hunting for a broken trace, does anyone have any other ideas/diagnosis or suggestions? It is also suspicious to me that the issue seems to be present only on sprites and not static images.. So maybe it's actually not memory related but another kind of error?
I will post photos of the card later tonight.
Retronautics: A digital gallery of my retro computers, hardware and projects.