nutballchamp
Well-known member
I'm stuck on fixing the jumbled background on my Qbert. Game plays find otherwise (except sound). Here's what I have done.
-Rebuilt power supply. I'm getting all correct voltages.
-Reflowed solder to filter board.
-Took out Clay Cowgill's Multi Qbert. I thought this might fix it with a new set of background roms. It still has a jumbled background.
-Cleaned, swapped and reseated srams e7 and e10-11. No change.
-As a test, I moved jumper Jp21 to Jp22. Background completely disappeared and foreground looked fine. See pics below.
Anything else to check? Thanks!
Jumbled background
Jumper moved from Jp21 to Jp22
-Rebuilt power supply. I'm getting all correct voltages.
-Reflowed solder to filter board.
-Took out Clay Cowgill's Multi Qbert. I thought this might fix it with a new set of background roms. It still has a jumbled background.
-Cleaned, swapped and reseated srams e7 and e10-11. No change.
-As a test, I moved jumper Jp21 to Jp22. Background completely disappeared and foreground looked fine. See pics below.
Anything else to check? Thanks!
Jumbled background
Jumper moved from Jp21 to Jp22
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