Symptom: No vertical sync. Fix: Bad output on 74LS08 @ J6. Replacing the IC cured the problem.
DanP Administrator Staff member vacBacker Feedback 5 (100%) Credits 2,173CR Feb 1, 2013 #1 Symptom: No vertical sync. Fix: Bad output on 74LS08 @ J6. Replacing the IC cured the problem.
DanP Administrator Staff member vacBacker Feedback 5 (100%) Credits 2,173CR Feb 1, 2013 #2 Symptom: Flashing green/yellow screen. Fix: Bad output on 74LS74 @ C8. Replacing the IC cured the problem.
Symptom: Flashing green/yellow screen. Fix: Bad output on 74LS74 @ C8. Replacing the IC cured the problem.
DanP Administrator Staff member vacBacker Feedback 5 (100%) Credits 2,173CR Feb 1, 2013 #3 Symptom: Entire screen blue. Fix: Bad output on 74LS08 @ J6. Replacing the IC cured the problem.
DanP Administrator Staff member vacBacker Feedback 5 (100%) Credits 2,173CR Feb 1, 2013 #4 Symptoms: Faulty sound explosions. Fix: Broken capacitor C70. Replaced cap
