Monitor blurs after a while

[d_unbeliever]

Got an old Monitor i want to use for typing jobs. When I turn it on there is no problem whatsoever but after few minutes the picture becomes blurry that it is difficult to read words. Brightness and contrasts are already full and/or adjusted. I consulted our PC technician and he said that I got to open and adjust something inside the Monitor. I was not able to clarify any further though how and which should i adjust. Any ideas how to fix this problem aside from buying a new monitor?

[waheed]

It would help if you provided the make and model of the monitor you are using and the computer specs.

[redwudz]

There is usually an internal focus adjustment. It is probably marked. But when the focus changes after the monitor runs a while, that is often a sign that the monitor power supply has a problem and may be failing. Not really sure if it would be worth the effort. And just to warn you - There are lethal voltages inside CRT monitors. Not something to take lightly. Check on the rear of the monitor. There may be an external adjustment.