Question about Compaq MV 540 15" CRT Monitor

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Shows half screen only!

My 8 year old MV 540 recently started showing only the lower half of the screen. The upper half is crunched into a thin bright line in the center. I could not find solutions on google. Any ideas?

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If you can't expand your screen size from the pulldown menu or vertically or horizontally center the picture one or two of the centering coils could be partially burned out. the monitor uses electromagnets around the crt neck to center the picture. varying the center controls apply or take away voltage from the coils to center the image. may be time for a new monitor

Posted on Jun 08, 2008

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if the last chip of the upper buffer has failed you may get what you get, even that this is a relatively rare type of failure.

The same would happen if the lower buffer is bad although this is again somewhat rare for a failure for those boards.

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I assume nobody has messed up with the TV because another possible explanation would be the two buffer boards were disconnected from each other.

The best is they are neither too expensive nor hard to replace.

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http://blog.coppelltvrepair.com/2010/10/vertical-or-horizontal-color-lines-in.html

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Could be something as simple as a bad contact on one of the deflection yokes or other coils on the cathode ray tube - check the contacts on the circuit board where these coils are connected, resolder the pins or wires if the contact is bad, also check connector pins for any dirt or oxydation and clean if necessary.

Read more about this kind of problem at:

http://www.repairfaq.org/sam/tvfaq.htm#tvpopco

Hope this helps somewhat.

regards

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