k4900 monitor problem - bright yellow screen and nothing else
So I've got this monitor that I've been trying to troubleshoot with no luck. It comes on with the entire screen bright yellow. Then it slowly fades to a less bright shade for a second or two. And then it suddenly gets bright yellow again. Can't see anything else. Turning the brightness and focus knobs all the way either direction makes no difference.
Fise F501 is good.
Voltage at R503 is +150 volts so that looks good.
Any tips on what this might be? Thanks!
So I've got this monitor that I've been trying to troubleshoot with no luck. It comes on with the entire screen bright yellow. Then it slowly fades to a less bright shade for a second or two. And then it suddenly gets bright yellow again. Can't see anything else. Turning the brightness and focus knobs all the way either direction makes no difference.
Fise F501 is good.
Voltage at R503 is +150 volts so that looks good.
Any tips on what this might be? Thanks!

