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Honor Student
Posts: 2
Member Since: ‎07-14-2009
Message 1 of 5 (13,558 Views)

Tower has power (light is on) but doesn't turn on

To start, I went out of town for 5 days and forgot to shut my desktop down (Compaq SR2011WM), so it was in sleep mode that entire time. I normally always leave my desktop on and haven't had any issues. However, when I got back in town and attempted to use my computer, the power was on but it wouldn't even attempt to "wake up". I unplugged the tower, plugged it back in (made sure the green light was lit and that it was getting power, and it was), and now when I press in the power button, even though it lights up, nothing happens. No startup "rev up" noise, no fan noise, nothing. I even left it unplugged for 2 days and tried again, same result. Does anyone have any suggestions or have any ideas on what exactly could be wrong? Thanks in advance for any help.
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Master's Graduate
Posts: 319
Member Since: ‎07-01-2009
Message 2 of 5 (13,550 Views)

Re: Tower has power (light is on) but doesn't turn on

This is just a guess.  Try this.  Unplug the computer and leave it unplugged for about 60 seconds.  Plug it back in.  Push the power switch.  If the power switch lights up and the computer does the same thing it has been doing, press the power button and keep it pressed until the computer appears to shut off.  Once it shuts off, push the power button once more to turn it back on and see if this makes a difference.


Let us know what happens either way.


Good luck.


In this forum, clicking on Kudos is a great way to say thanks.  :smileywink:


In this forum, clicking on Kudos is a great way of saying thanks.  :smileywink:

Honor Student
Posts: 2
Member Since: ‎07-14-2009
Message 3 of 5 (13,545 Views)

Re: Tower has power (light is on) but doesn't turn on

Yeah I actually already tried that and unfortunately it doesn't respond when I hold the button in either. The odd thing is when I unplug the power cord, the green light around the power button stays lit for about 10 seconds, and I know it didn't used to do that.
Associate Professor
Posts: 1,250
Member Since: ‎01-27-2009
Message 4 of 5 (13,538 Views)

Re: Tower has power (light is on) but doesn't turn on

Disconnect all devices except for mouse, keyboard, and monitor.  Reseat RAM and all connectors inside the PC.  Disconnect the hard drive.  Clear CMOS.  Hit power switch and go to BIOS.  If you cannot access BIOS, then the power supply or MB may be defective.  The board is a cheap entry-level ECS.
Posts: 17,959
Member Since: ‎11-21-2008
Message 5 of 5 (13,531 Views)

Re: Tower has power (light is on) but doesn't turn on

MMD, this sounds like a power supply unit (PSU) problem.  There is enough power for the led's to light up, but not enough to boot the computer.  I recently had a similar situation with my computer (not a HP).  I replaced the PSU and it is working great.


Here is a link about testing your PSU:


At the bottom of the page in the link, there is also a video on replacing the PSU.


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