Code C710, CRTC Switching Circuit Problem: Notes
NOTE:
Test numbers refer to numbers on diagnostic chart.
- CRT/DID monitor needs communication from CRT/DID controller to initially glow. If CRT monitor lights initially, it is receiving signals from controller.
- If CRT/DID is blank at times and Code C710 is set, monitor is not receiving correct data line signal.
- Checks voltage on CRT controller-to-CRT/DID data line. Normal voltage fluctuates slightly between 1.5 and 4.5 volts.
- Checks whether CRT/DID or CRT controller is causing low voltage reading on data line.