|
Asteroids No Boot / asteroids not booting
|
P1 & P2 volcano LED solid.
Speaker buzz.
Main PCB LED illuminated.
No display, spotkiller LED sometimes on or dim.
5.05v could be measured at A/R with max adjustment of pot.
Measurement at 5v TP on main board was 4.95.
Chips were warm, no watchdog loop.
All edge connectors & wires had good continuity.
Noticed c5 clip mod was present. Not relevant to repair solution.
Getting to the point. Even though DC voltages were okay measured at the A/R board, AC test of big blue indicated presence of 3VAC.
|
Big blue was original, manufactured 1978. Replaced with new.
Board now boots , responds to input, plays all sounds, p1 & p2 have good blink. Screen has display and spot killer is off, but horizontal collapse is present ("G05-801").
| Fixed |