Whenever we shut down we find there is a kind of backlight that remains on. Only way to get it off is to unplug. Monitor just changed because of it and the new one does the same. First one worked for a few months before doing this. Any ideas?
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Do you see anything? No "ghost image"? A white cursor in the top left? Any damage ? Drop? Jarred? Bumped? May be backlighting, inverter, lose ribbon cable, bad graphic adapter. Can you attach a external monitor to verify the graphics adapter? Take a look at this video for ideas: http://www.youtube.com/watch?v=2Yi6GNFcP3w Remove ALL media from DVD rom, usb, etc. shut down, unplug, remove battery, plug in, reboot. Any change?
Look for your computer's monitor settings, then adjust its refresh rate. To modify a refresh rate on Windows, right-click anywhere on the Windows desktop. Select "Properties," then choose the "Display Properties" tab on the window that appears.
Click the "Settings" option, then select "Advanced" from the window that appears. Choose the "Monitor" tab, which lets you access a drop-down menu with the options for refresh settings adjustments. As a basic guide, use a setting of at least 75 hertz.
Confirm the change by clicking "Apply." Reboot the PC to ensure the new settings on the screen take effect. Check your screen if the blinking problem is resolved. If not, try a higher refresh setting. If there is no change on the flickering of the screen, this means the problem is not caused by the screen's refresh rate. If your computer is not running on a battery or surge protector, shut it down to safely transfer the plug to another outlet Hope this helps.
Shut pc down unplug power supply press and hold power button for 20 seconds to remove all remaning power.open case clean any dust find ram sticks remove them make sure there clean and re seat them back into there slots.your monitor could be the cause also unhook it while pc is unplugged. now put it all back together and turn it on..if it doesnt shut it down un hook monitor and fire up pc see if the pc boots by watching the lights.if so bad monitor does light turn blue on monitor when power on.
You need to do two things. First, switch out your monitor input cord (the blue one) and get a new one. If you don't have a new one, then unplug both ends and make sure none of the pins are bent or broken. Then plug and screw in completly. If that doesnt work, google your monitors name and drivers, and redownload the drive for it. It should take you through a repair proccess which should fix it
That LCD monitor uses a fluorescent backlight, and the symptom you are seeing probably means the backlight is failing. There are two possible problems:
1) Likely: The inverter board is failing. The inverter creates the high voltage needed to run the backlight and can shut down after a short time if the board is failing.
2) Less likely: The fluorescent tubes themselves are failing. This usually requires replacing the whole LCD screen, although experienced technicians can disassemble the LCD screen and change the bulbs. This is much riskier.
The best bet is to replace the whole monitor. If you are willing to take apart the monitor and try a repair, you may be able to get an inverter and fix the problem.
Sellers on eBay usually carry a lot of models of inverters and may be able to sell you one and guide you through a replacement. However, this is a moderately advanced repair.
Search for the HP exact model and "inverter" on eBay
Hold down the power button on your monitor, with the power on, for approx. 25-30 seconds and the monitor will shut down for good. When you will start it again, wait at least an hour, the message will be gone and the monitor will work as intended.