Reassembled my robotron (after stripping paint and getting the base color applied), using rebuilt PS and reworked IO card (i had powered machine with fixed parts briefly before disassembling, but had not run it for long).
First day after re-assemble, i could play for about 30 minutes until it would reboot or halt - pressing the reset button would show LED code for bad ROM 6. Today i pulled the ROM and reseated the chip (didn't clean) and the problem has not come back.
However, after about 2 hours of powered on, with random plays, it started to display oddities, while allowing normal game play. Sometimes the screen is loaded with vertical stripes, sometimes the area that should be black is an odd green color. Typically the display is flashing between normal and messed up. When in attact mode, it sometimes displays only the green logo circles and the rest of the screen flashes the green color. Resets show 0 on the LED.
Turning the machine off for 10-30 minutes is not allowing normal operation.
any ideas what i can try?
First day after re-assemble, i could play for about 30 minutes until it would reboot or halt - pressing the reset button would show LED code for bad ROM 6. Today i pulled the ROM and reseated the chip (didn't clean) and the problem has not come back.
However, after about 2 hours of powered on, with random plays, it started to display oddities, while allowing normal game play. Sometimes the screen is loaded with vertical stripes, sometimes the area that should be black is an odd green color. Typically the display is flashing between normal and messed up. When in attact mode, it sometimes displays only the green logo circles and the rest of the screen flashes the green color. Resets show 0 on the LED.
Turning the machine off for 10-30 minutes is not allowing normal operation.
any ideas what i can try?

