Computer goes to sleep when I turn it on

February 5, 2010 at 11:42:54
Specs: Windows XP
My monitor goes to sleep when I turn the computer on . I have replaced the graphic card and also tried it with another computer but the problem still persist.

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February 5, 2010 at 12:04:55
U tried in another pc, what is the result? Sounds like psu failure, try to change it.

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February 5, 2010 at 12:13:43
You think the PC itself is OK because fans and drives spin and LED's flash when you turn it on. But that only means you've 5 and 12 volts to power that hardware. The power supply can still be bad since it needs to provide other voltages at sufficient amperage.

Or the problem could be with the motherboard or both the PSU and motherboard, as a bad PSU can ruin a motherboard.

That's the worst that could happen. If you're getting any beeps when you turn on the computer, either the standard single beep or a series of long or short ones then post back that information and maybe something can be done.

Also, temporarily disconnect all the drives and remove all cards except video and then see if the video responds. If so, then one of the disconnected or removed items is at fault.

You're not really green until you're soylent green.

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February 5, 2010 at 12:15:25
You have not supplied enough information.

Do you see no video at all, other than possibly a message from the monitor itself? E.g. No signal.
Or - do you see video while booting, but then when Windows is supposed to load, you have no video?

Are the leds on the case lighting up when you try to boot? Do you hear the fans spinning? Do you hear the hard drive spin up to speed?

Does the hard drive led flash for a while like it normally does when you are booting into Windows?

"My monitor goes to sleep when I turn the computer on .I have replaced the graphic card and also tried it with another computer but the problem still persist."

Clear as mud.
What did you try with the other computer? The replacement video card, the original video card, or the monitor?
Onboard video is a video adapter but IT IS NOT A CARD. Were you using a card in a slot originally, or onboard video?

When you have a video problem with a computer, usually there's nothing wrong with the graphics adapter, unless it has been damaged by something dumb you did, or the fan on the video card is no longer spinning, if that applies, and the video chipset has burnt out.

If you tried the graphics card that was in it with another working computer, and it didn't work, assuming you hooked it up properly (some recent cards must have an extra power connector from the power supply plugged into a small socket on the video card), the graphics card is probably fried.
However, if the other computer is recent and has onboard video, and did not have a video card in a slot before, some recent mboards DO NOT disable the onboard video when you install a card in aslot, and by default a video card in aslot produces no video! You have to go into the bios when the monitor is connected to the onboard video port and change the Primary video or Intialaize video first or similar setting to PCI-E or similar, Save bios settings, then the video card in a slot should produce video.

If the monitor does not work when it's connected to a working computer, the monitor is defective, and probably not your computer video.

If it's an LCD monitor, the backlight is probably failing, or alot less likely, the voltage inverter that supplies it with high voltage is defective.
For some info about replacing a voltage inverter or backlight, and what some typical symptoms are, see response 5 in this:
Most people just get another monitor.
CRT (tube) , Plasma, and the recently introduced expensive LCD LED monitor's displays last a lot longer than LCD monitors.

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February 5, 2010 at 12:33:15
The computer turns on and yes we can hear the beeps and the equpiment inside working,but the signal is just not reaching the monitor. We have tried it witho other monitors but it still fails to recieve the signal. Yes it shows nothing at all.

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February 5, 2010 at 12:46:44
Describe the beeps. Just one or several? Long or short? Are the beeps different than when it worked OK?

Disconnect the hardware as I mentioned above.

You're not really green until you're soylent green.

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February 5, 2010 at 12:54:20
Try the original monitor with another computer, but in most cases there's nothing wrong with it.

Two more sentences isn't enough info.

Are you hearing only one beep early in the boot, which is normal, or something different?

Were you using onboard video or a video card in a slot originally?

Does the mboard have onboard video? If it does, try a monitor connected to that, when a video card is NOT in a slot.

Have you changed which ram is installed since the video last worked?

If you have NOT, try this:
See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:

If you HAVE changed which ram is installed since the video last worked, try that in that case too, BUT not all ram is compatible with your mboard - if you still have the ram that worked fine before, try installing ONLY that ram.

Remove the AC cord to the case / PS, or otherwise switch off the AC power to the case / PS, at ALL times when you're fiddling with connections or components inside the case ! The ATX mboard is always powered in some places even when the computer is NOT running, as long as the PS is getting live AC power !

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February 5, 2010 at 12:55:26
No,the beeps are not different to when it was functioning properly before.

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February 5, 2010 at 13:03:49
Please answer all the questions we're asked, and make comments about what we said one way or the other.
The more info you supply, the sooner we're likely to be able to tell you the likely or possible cause.

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February 5, 2010 at 13:21:58
I have removed all the cards and I have used another slot for the graphic card still not seeing the monitors. I am soory I can not hear any beeps and the yellow light is permanently on.

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February 5, 2010 at 13:45:33
A properly working computer beeps ONCE at startup. You keep mentioning BEEPS. If there's more than one beep, you have a problem & the beep pattern is a code that clues you into what that problem is.

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February 5, 2010 at 14:35:47
See response 6, regarding the ram.
Try re-seating it, and or putting ram that worked fine previuosly back in if you did change which ram was installed.

If the computer still will not start up properly.....

Remove the AC power to the case/power supply.
Switch off the monitor.
If you have no onboard video (video built into the mboard), install a video card in a slot you know works on another computer, if you can.
If you have onboard video, do not install a video card.
Remove all the ram.
Restore AC power.
Try to boot.
If nothing else is wrong, you will get no video but you will hear a pattern of beeps that indicate no ram is installed, or a ram problem.
E.g. for an Award bios or a bios based on one, that's often a beep of about a half second, silence for a half second, a beep of about a half second, silence for a half second, continuously.

If you have to install a video card because you have no onboard video, or if you don't install a video card and you don't have onboard video, you may or may not hear a different pattern of beeps that indicate a problem with the video, if the video card is no good, or is missing.

Tell us what happens, in detail !

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February 5, 2010 at 20:59:35
If you have done everything listed above try booting into safe mode for your computer. This will load a basic video driver at a safe resolution. If somehow your video signal to the monitor is higher than it will accept it may do this to protect itself. This may help narrow things down a little more. Good luck, RSG

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February 5, 2010 at 21:20:40

No video drivers are required while booting before Windows loads. Support for that is built into the bios and all video adapters.

He has no video at all, so far as we've heard from him. He's tried several monitors and at least two video adapters.

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February 5, 2010 at 22:05:58
If he get beeps then it could be ram issues, but since he can't describe the beep code we only guess.

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February 5, 2010 at 23:00:03
If your computer goes to sleeping mode you have to press the
power button once and short.

If your monitor goes to sleeping mode and your computer is
on you can press a mouse button and a key like the

What is usually do is first.

press a mouse button, then the escape key then turn of
monitor and turn on. Whit each step i wait until is see a
screen. If this all is not working i think you have a problem
with the resolution you have set in windows. In this case you
have to reboot your computer to safe mode, change your
display to a low resolution, reboot and in windows you can
change your setting again. Always test your setting before
you apply.

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February 6, 2010 at 00:31:15

If u read the post careful, u will find out that the system won't post, that means hardware problem.

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September 24, 2010 at 11:35:58
what if the resolution set is the default that you've used all along? revert back to the beeps and troubleshooting?

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