Power Supply turns on all fans, case power on does nothing, no display

edfialk · 06-10-2008, 06:28 AM

Hi all, I just tried replacing my video card yesterday, which I've done at least a hundred times before. Unfortunately, this time something went wrong.

After I screwed in the video card, hooked everything back up, put the case back together, I plugged in the power chord to the Power Supply, and switched it on.

At this point, at least for how my computer has been before, nothing should happen. The LED's should come on, but no fans should turn on until the power button on front of the case is pressed.

Unfortunately, as soon as I turn on the power supply, all the fans start going. I can even open the cd drive. The blue LED on front of the case to indicate power/busy does not come on. The power on switch on the case does nothing. I get no display at all, and I'm completely stumped on what to do.

I've taken out all peripherals, both HD's, CD drive, 1/2 sticks of ram, and even the video card, but every time I turn on the power supply in the back of the case, everything starts whirring. I just don't think it's a real bootup (no display), and I can't understand why just turning on the power supply to allow power to come through is automatically turning everything on and ignoring the case power button.

I would be so utterly amazed if anyone could help me. You would save my year. Any help would be extremely appreciated.

Thanks!
-Ed

Oops, specs:
MOBO: ASUS A8N5X
CPU: AMD X2 4200+
RAM: 2G DDR2 400
new vid card: EVGA NVIDIA 8800 GT

TyDeacon · 06-10-2008, 08:00 AM

Try going into the BIOS and selecting for video to go to the PCI-E slot

HawMan · 06-10-2008, 08:00 AM

Welcome

What PSU are you using?

edfialk · 06-10-2008, 08:39 AM

Quote:

Originally Posted by TyDeacon

Try going into the BIOS and selecting for video to go to the PCI-E slot

I can't get into BIOS. I have no display. After turning on power supply, case power button does nothing.

-What PSU are you using?
Thermaltake TR2-500PP. 500 watts, 14&15 amps on +12V, my vid card only needs 26.

Thanks guys, I'll respond ASAP to any more questions.

MattSif · 06-10-2008, 10:08 AM

Try using your onboard video card, see what happens, if it's the same thing as my problem, i'll hope we both get a solution.

edfialk · 06-10-2008, 10:29 AM

Yeah, I have no onboard video :(

dai · 06-10-2008, 11:52 AM

disconnect the front button from where it connects to the 2 pins on the m/board
if it still powers straight up
the m/boards the problem
if it does'nt,touch the 2 pins with a small screwdriver if it powers up replace the case button

Banscare · 06-10-2008, 12:00 PM

Does the hard drive spin? You can tell from the sound.

edfialk · 06-11-2008, 07:28 AM

disconnected front button from motherboard, still powered up.
took out everything from mobo, including cpu, ram, hd's, etc. all but a single case fan, and turning on PSU still powered up that case fan.

Probably mobo.

dai · 06-11-2008, 11:15 AM

set it up out of the case on a piece of cardboard with
cpu
video
ram
speaker
and see if you get post
check you have the correct amount of standoffs no more no less
that they line up with the holes in the m/board
usually 9
if it's still the same and the m/b's under warranty
rma it

06-10-2008, 06:28 AM	#1 (permalink)
edfialk Registered User Join Date: Jun 2008 Posts: 4 OS: XP	Power Supply turns on all fans, case power on does nothing, no display Hi all, I just tried replacing my video card yesterday, which I've done at least a hundred times before. Unfortunately, this time something went wrong. After I screwed in the video card, hooked everything back up, put the case back together, I plugged in the power chord to the Power Supply, and switched it on. At this point, at least for how my computer has been before, nothing should happen. The LED's should come on, but no fans should turn on until the power button on front of the case is pressed. Unfortunately, as soon as I turn on the power supply, all the fans start going. I can even open the cd drive. The blue LED on front of the case to indicate power/busy does not come on. The power on switch on the case does nothing. I get no display at all, and I'm completely stumped on what to do. I've taken out all peripherals, both HD's, CD drive, 1/2 sticks of ram, and even the video card, but every time I turn on the power supply in the back of the case, everything starts whirring. I just don't think it's a real bootup (no display), and I can't understand why just turning on the power supply to allow power to come through is automatically turning everything on and ignoring the case power button. I would be so utterly amazed if anyone could help me. You would save my year. Any help would be extremely appreciated. Thanks! -Ed Oops, specs: MOBO: ASUS A8N5X CPU: AMD X2 4200+ RAM: 2G DDR2 400 new vid card: EVGA NVIDIA 8800 GT Last edited by edfialk : 06-10-2008 at 06:30 AM.

06-10-2008, 08:00 AM	#2 (permalink)
TyDeacon Registered User Join Date: Aug 2007 Posts: 227 OS: XP	Re: Power Supply turns on all fans, case power on does nothing, no display Try going into the BIOS and selecting for video to go to the PCI-E slot

06-10-2008, 08:00 AM	#3 (permalink)
HawMan Liam Join Date: May 2006 Location: Edinburgh, Scotland Posts: 2,563 OS: Win XP My System	Re: Power Supply turns on all fans, case power on does nothing, no display Welcome What PSU are you using? __________________ Please Consider Donating to keep the site free.

06-10-2008, 10:08 AM	#5 (permalink)
MattSif Registered User Join Date: Jun 2008 Posts: 1 OS: Windows Vista Premium	Re: Power Supply turns on all fans, case power on does nothing, no display Try using your onboard video card, see what happens, if it's the same thing as my problem, i'll hope we both get a solution.

06-10-2008, 10:29 AM	#6 (permalink)
edfialk Registered User Join Date: Jun 2008 Posts: 4 OS: XP	Re: Power Supply turns on all fans, case power on does nothing, no display Yeah, I have no onboard video :(

06-10-2008, 11:52 AM	#7 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 41,798 OS: vista 32x ultimate retail	Re: Power Supply turns on all fans, case power on does nothing, no display disconnect the front button from where it connects to the 2 pins on the m/board if it still powers straight up the m/boards the problem if it does'nt,touch the 2 pins with a small screwdriver if it powers up replace the case button __________________

06-10-2008, 12:00 PM	#8 (permalink)
Banscare Registered User Join Date: Jun 2008 Location: St John's NL Posts: 137 OS: XP Pro 64bit My System	Re: Power Supply turns on all fans, case power on does nothing, no display Does the hard drive spin? You can tell from the sound. __________________ Ban Computer Support Specialist (MCP, MCSE)

06-11-2008, 07:28 AM	#9 (permalink)
edfialk Registered User Join Date: Jun 2008 Posts: 4 OS: XP	Re: Power Supply turns on all fans, case power on does nothing, no display disconnected front button from motherboard, still powered up. took out everything from mobo, including cpu, ram, hd's, etc. all but a single case fan, and turning on PSU still powered up that case fan. Probably mobo.

06-11-2008, 11:15 AM	#10 (permalink)
dai Manager, Hardware Forums Join Date: Jul 2004 Location: west australia Posts: 41,798 OS: vista 32x ultimate retail	Re: Power Supply turns on all fans, case power on does nothing, no display set it up out of the case on a piece of cardboard with cpu video ram speaker and see if you get post check you have the correct amount of standoffs no more no less that they line up with the holes in the m/board usually 9 if it's still the same and the m/b's under warranty rma it __________________