Dead blue gun

Hello, snipped-for-privacy@gmail.com! You wrote on 24 Mar 2006 08:45:26 -0800:

d> Well, I have a RGB monitor here, computer monitor, with a dead blue d> gun.

d> Any sugestions?

Try swapping the output for the red or green in order to find out if it's the CRT that's at fault or the video amps. If it's the CRT it's scrap but if it's the blue output it's fixable. Also post model details for a more sensible suggestion. Pete

With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com

Wiggle the CRT connector (carefully)!! A good 33% of the time the problem is corroded contacts right there.

Tweak the blue screen and blue drive controls -- 18.7% of the time it's a dirty control.

Carefully use a scope or voltmeter to look at the voltages between the blue drive transistor emitter, base, and collector. Compare this with the volatages on the red and green transistors. About 19% of the time the problem is a bad transistor right there.

Test the cable first, i had a lot cases where the cable failed.

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