All of a sudden my computer screen on my apt. computer went to "black". I thought it was in the sleep mode so I tried moving the mouse. That didn't help. I then turned the monitor off then on...you could see the screen for 1 second then it went black again. I tried unplugging everything and plugging it back in. I tried to just turn computer off and on again. Nothing has worked. I now have just turned everything off.
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I find sleep mode nothing but trouble, eventually corrupts window files over extended use, go into power options, go to stand by and select never and click apply, next go to hibernate "top right" and click, make sure the check box is clear, if not! remove check and click apply and restart your laptop.
Go to Control Panel, (top right View Small Icons). Then look for Power Options. On this page, you'll have the option to leave the monitor on. You should also check "Advanced Power Options". Don't be afraid of the word, "Advanced." It only means "customizeable"
If your mouse isn't waking your monitor, try the keyboard's space bar. I found it works better than the mouse at waking a sleeping computer
The high pitch sound is coming from the inverter. It is faulty and needs to be repaired or replaced. The inverter supplies high voltage to the CCFL lamp, this lamp gives the backlight to the LCD so you can see the LCD images.
Check out LCD parts for parts, service and DIY info. use this link :- www.lcdparts.net
it is going into sleep mode, good luck with this.... i am currently asking how to get my hard drive to quite putting my monitor into sleep mode.
although it hasn't worked for me because my screen stays black, one of the options given to me is to try to start in safe mode and then adjust your settings to "never" on the energy/sleep/hibernate mode
some one else suggested that i remove and reseat the video card
I had a similar problem whereas my monitor went to sleep mode after a few minutes. I'm running an HP LP 2065 in dual mode with another HP flat screen. However, I did resolve the issue after resetting the output settings.
How to do that:
right mouse click on the desktop
select graphic options
Maybe some changings/modification will help you too.
I have had similiar issues in the past. Try powering it down by un-plugging it from the back of the pc, wait at least 2 minutes before plugging it back in. After 2 minutes, plug it back in and power on the pc. Sometimes this helps.