Check that the power cord is fully plugged in first.
It is probably the inverter board inside the monitor. (if the screen does properly display ever then it is not the screen) It CAN be fixed but I do not suggest anyone open up a monitor (LCD or CRT) who is not "technically inclined."
If you really want to fix this particular one then take it to a local tech and get an estimate first. If it's almost as much as a new monitor then buy a new one.
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If you turn the monitor off then about 1020 sec turn it back on and have
a picture for five sec again it sound like the power supply in the
monitor. but if that did not solve the problem, the
picture board on your monitor is bad, since it goes off after few
seconds and the power led or button is on, it means the
board of your monitor has developed fault and will need to be replace.
advice you replace the picture board on the screen of your monitor to
solve the problem of the blank screen.
1. You can see images on the screen for a few minutes. That means there is nothing wrong with your computer.
2. When your screen goes blank, if you disconnect and then reconnect the monitor, it shows fine again for a few minutes before going blank (or dim) again. That means the problem is not with you video card.
3. It always shows the image after reconnection for exactly a few minutes before going blank again. yes? this means that there is nothing wrong with your cable.
Conclusion: Sorry, but you do not have many options. I bleieve that the problem is with your monitor that's going bad. Its far cheaper to get it replaced than to repair it.
Ive seen this on other monitors. Look for a 1 and 2. Some monitors do NOT auto detect a signal, and this one might not. Look for a way to set the monitor from Digital input to VGA input. Try that and see.
You have a monitor with a common problem. After a few years some LCD monitors will blow a power supply. The problem is caused by parts called capacitors overheating in the confined space of he monitor. If you are good at electronics repair/soldering you can usually fix he problem. Check out a few pictures on my web site www.ccl-la.com/badcaps.htm You can take the back cover off your monitor and look for the bad parts, replace any that look like the pictues and your monitor should work fine. The capacitors do need to be installed with the correct + and - connections, note the stripe on the old one and insert the new one the same way. If you don't want to try the repair yourself we offer a repair service for $35 plus shipping. I hope this helps, if so please rate my solution.
Buddy Corporate Computer Over 21 years of computer and printer support/repair
Two possible causes are bad capacitors or a bad light inside the LCD panel.
Open the unit and check to see if any of the capacitors in the power supplyor other boards look domed or vented on the top.
Replace any capacitors accordingly. Monitor should work fine after that.
If not try checking the surface-mount transistors on the inverter board
that run the lights. Some times these transistora go bad. Also, you may
have a bad light inside the panel. This is tough to test without a
spare light to use for troubleshooting the panel lights.
You can take the panel apart and inspect the lamps but it is very
tedious. It's tough enough to get them apart and back together again
never mind keeping the layers clean. You have to try not to get any
dust between the layers or you will see it in the picture.
There's usually two light fixtures each of which holds two lamps. One
fixture at the top and one at the bottom. Remove them one at a time and
inspect the lamps to see if any are broken or very dark on the ends. If
one looks out of place, it could be bad.
You'll have to find replacement lights on the net. It's not easy to
replace them, but if you've gone this far, good luck. You should be
able to get generic instructions off of the site that sells the lamps.
It could also be that the video card is not compatible with this monitor. After the pc boots up, can you get into windows? Does the monitor always go out at a specific time on boot? Say for example; you boot the pc, windows startup splash screen comes on; screen does a quick flash and goes blank. Then it maybe the BIOS setting for the video. Try changing the IRQ setting. You could also try putting the video card in another slot. Do you have the manual for the motherboard?