don1400
Member
Hello,
Got a Galaxian board that needs some repair and was wondering if some of the experts here might have an idea what's going on. Attached is a vid of the board running.
Some prior repair work has been done to the board, new sockets on main board, 245's replaced, socketed, as are all 6 Ram chips, Z80 good, daughter board verified working properly. ROMS have correct checksums. I did a complete point to point continuity check on the data and address buss's, all ok. Reset line pulses from high to low all the time, when I push reset switch it goes low as long as I hold switch in. It's a bit didfficult to see but when the dots are on the screen you can see star field, they run up, also notice some letters numbers are upside down.
Anyone have any thoughts on where the problem could be, I found a few repair posts on places like Mike's arcade and others but none had any of the symptoms my board has.
Thanks for any help in advance.
Rich
Got a Galaxian board that needs some repair and was wondering if some of the experts here might have an idea what's going on. Attached is a vid of the board running.

Some prior repair work has been done to the board, new sockets on main board, 245's replaced, socketed, as are all 6 Ram chips, Z80 good, daughter board verified working properly. ROMS have correct checksums. I did a complete point to point continuity check on the data and address buss's, all ok. Reset line pulses from high to low all the time, when I push reset switch it goes low as long as I hold switch in. It's a bit didfficult to see but when the dots are on the screen you can see star field, they run up, also notice some letters numbers are upside down.
Anyone have any thoughts on where the problem could be, I found a few repair posts on places like Mike's arcade and others but none had any of the symptoms my board has.
Thanks for any help in advance.
Rich
