Symptoms:
Asteroids resets after about 20mins play and then vectors start jumping around everywhere. Game is still playing.
Diagnosis:
Vector RAM (2114) at M4 is bad. As soon as the board started resetting I put the pcb into test mode and got 2 tones and then a lower tone. Beep codes pointed me to M4. Replacing the RAM has fixed the issue. Test mode did not pickup the fault until the RAM heated up.
Asteroids resets after about 20mins play and then vectors start jumping around everywhere. Game is still playing.
Diagnosis:
Vector RAM (2114) at M4 is bad. As soon as the board started resetting I put the pcb into test mode and got 2 tones and then a lower tone. Beep codes pointed me to M4. Replacing the RAM has fixed the issue. Test mode did not pickup the fault until the RAM heated up.
