I was cleaning the inside of my pc because of the blanket of dust on everything and when i connected the monitor cord back to the pc the monitor turns on and then shuts off. when this does happen it gives no display. Could it be the graphics card. the computer is a hp pavilion a1226n it has a ati radeon integrated chipset.
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I had that problem awhile ago, but the issue was a loose connection.
If you test your PC with another good working monitor/cable and still receive a no signal message, then the problem is with your PC.
The solution could be as simple as dust inside the unit interfering with the signal, and needs to be blown out, or try removing the power cord and hold-in the 'on button' for about 30 seconds to a minute; then reconnect the power cord and turn it back on.
Other solutions: open up your PC and take out and put back in the video card; remove the ram memory strips, rub the end gold colored strips on a clean cloth and put them back; or maybe you have a bad video card.
It sounds like the viewsonic power supply inside your monitor is Clamping due to a heavy load or a short circuit. The best method for getting your monitor back to normal, is to carefully disassemble the unit and clean the dust and lint from everything inside. I use a paint brush to sweep the circuit boards off. Evidently you have something shorting out inside. You will want to look for anything that does not belong inside like jelly or anything crazy like that. If you have further problems contact me at Repairtech@playstationclinic.com.
I had a similar problem with my monitor, it turned out to be a loose connection inside the unit, there is a motherboard inside the monitor, it was between this and the LCD that a cable had come loose, some dismantling of the monitor but worth a try.
Check the cord where it plugs into the pc (video card) If you can tweek it to make it come back on then it's the card or the cord. Try a different cord. It could be a heat problem also. Try putting a fan near the computer back or the monitor back and see if that works. Sometimes dust can be your enemy when it pack on a part and lets it heat up. There are several blogs relating to this problem. Just type in you monitor model into yahoo or google and look for a blog. If the solutions dont work I gave you. Good Luck
It could be an overheating problem. Be sure all cooling fans and heatsinks inside the unit are clean of dust. (coolers are usualy on the processor, video card, inside the power supply and sometimes on the case itself front and/or back)
The best way to get it clean is to use a vacuum cleaner that has the option to connect the hose on the air exhaust, blowing air. The second thing you need is a very soft paintbrush wipe gently the dust from main components. Be sure not to touch by hand or hit any components.
White screen means that the video signal is not getting from the vga board inside the monitor to the actual lcd screen panel. It may be a bad vga input board (also called a main board) OR It could be simply a bad connection on the wiring harness that connects this board to the lcd panel Or it could be a blown fuse on the board on the board that is permanently mounted to the back top of the lcd panel. I would check the wiring connection to the lcd panel inside the monitor first