makamusement
New member
Galaga vid board help -lines on screen pic included
I have a Galaga Video Board with a strange issue. The game works and plays, but has these 2 lines about a half inch thick that run the width of the screen during the entire game. See attached picture.
Here is what I know for sure.
1. Not a monitor issue - plugged in a working boardset and no issues.
2. Not a CPU board problem, swapped the CPU with a know working vid board and no issues.
3. Not an issue with any of the custom chips. Swapped the custom chips from known working video board and same issue remains.
4. TTL chips all measure OK with Logic Probe when compared to the working video board.
5. Not an issue with the connector between the 2 boards - swapped this one into known working boardset and no issues.
Any help at all is appreciated. Thanks in advance
I have a Galaga Video Board with a strange issue. The game works and plays, but has these 2 lines about a half inch thick that run the width of the screen during the entire game. See attached picture.
Here is what I know for sure.
1. Not a monitor issue - plugged in a working boardset and no issues.
2. Not a CPU board problem, swapped the CPU with a know working vid board and no issues.
3. Not an issue with any of the custom chips. Swapped the custom chips from known working video board and same issue remains.
4. TTL chips all measure OK with Logic Probe when compared to the working video board.
5. Not an issue with the connector between the 2 boards - swapped this one into known working boardset and no issues.
Any help at all is appreciated. Thanks in advance
