Repair manual

3-18
TROUBLESHOOTING
Check U1 Pin 1 for
Horizontal Signal
No Video on CRT
Check Input Voltage on P9
Pin 15 + 12V
Pin 1 + 12 V
Yes No
Check E1 Yellow Wire
on Monitor Board For
Video Signal
Check Power
Supply & Wiring
Check Base of Q3 on
Monitor board for Video
Signal
Yes No
Replace Monitor
Board Assembly
Replace Monitor
Board Assembly
Run Diagnostics to
Verify Logic Board
Failure
Replace Monitor
Board Assembly
Yes No
Run Diagnostics to
Verify Logic Board
Failure
Yes No
GENTEST - FULL WHITE SCREEN
Chart 8