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I have a compaq desktop whose power supply blew and i was forced to replace it with another one.After replacing it i switched on my pc of which it did but the monitor remained black(sleep mode).The video card is onboard so i blew away some dust around it but did not use a blower.After that the monitor picked the signal and before it finished booting it gave the message "hv frequency over range" and went off.After a day i tried it and it worked for about 15min and the same problem reoccured.I gave it a break and this time after 2days i tried it on and it has been working properly for a week.When i turned it on expecting it would continue working properly, it gave a black screen.I tried it later and it gives the message above immediately after booting and then successive trials give a black screen.Please help.Is it the video card that is faulty?Now that its on board, how do i replace it?Or are there any settings i need to configure to rectify this without necessarily having to replace it?Thank you in advance.

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It sounds like your video card is set to produce a resolution / refresh rate beyond what your monitor is capable of reproducing. Try booting into safe mode - assuming you are running windows- by holding / tapping F8 while your turning on your computer. if you get something on your screen in safe mode you know your settings are incorrect or you have an improperly installed video card driver. reinstall the drivers while in safe mode and reboot.

Posted on Mar 15, 2011

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