I have a ctx S700 screen which has been working fine for some time, but about 1 year ago it got vertical multi colour lines over the entire screen - reboot resolved. Now this problem is happening within about 15 - 20 mins of each usage - any ideas please.
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This is the power supply inside the monitor itself. It is board that has three capacitors and they are blown out. It is a very inexpensive fix, if you are good with a soldering iron, if not let mw know and I will direct you to a company that can take care of this, for usually $30.00
If you are referring to a conventional CRT monitor, then the fault you have described is indicative of a cold solder in the vertical section. Often, this would be any of the pins of the vertical IC. The vertical IC is the only IC that is heatsinked and sits at the back of the flyback transformer.
This of course would require a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings. Should you be uncomfortable performing a DIY (do-it-yourself), perhaps your best bet would then be to seek the services of a qualified professional.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
Good luck and kind regards. Thank you for using FixYa.
First, I would try connecting a different monitor if possible. If the problem persists, it would be a problem with your computers video card. If the 2nd monitor works fine, then your monitor is at fault and may need to be replaced.