Computer turns on but wont come up on screen

June 24, 2009 at 08:43:12
Specs: Windows XP
Ok, so I went out and bought a new case for my computer (Not enough room). The computer itself is a custom build me and my father did about 2-3 years ago. Before I swapped everything over to the new case I installed a new 1TB hard drive and set it up as a secondary drive. Anyway, after getting everything hooked up I went to power it up and my 500W power supply blew up. Yesterday I went out and bought a new power supply unfortunatly all they had was a 450W. Now when I turn it on, everything looks like it is working (All fans spinning, and the lights come up) but the screen is not getting an input. So I took out the graphics card and hooked the monitor up to the mother board and now all I get is a black screen with a blinking cursor.


All help is welcome

Thanks much,
ET3 Elliot Moore, USCG


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#1
June 24, 2009 at 09:05:47
Sounds like more than the PS went.
Start with Basics
Disconnect everything except monitor CPU and RAM.
See if you can get to the BIOS

What happened to my quote


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#2
June 24, 2009 at 09:11:24
Thanks I'll try that when I get home, I also think the new PSU isn't putting out enough power (seeing as I dropped the Wattage from 500 to 450), because the Power LED for the hard drives will come on for a second then flicker out.


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#3
June 24, 2009 at 13:00:44
500 to 450 is not that significant. When power supplies fail, they usually take something else out with it. Not in every case, but in most cases. I had the same happen to me when working on an Emachines.

WinSimple Software
CompTIA A+ Certified


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#4
June 24, 2009 at 13:33:03
Do you have to enable onboard video in the m/b BIOS before it will work? Also, depending on what kind of video card you have, the drop from 500 to 450 watts may be significant. Some of the newer video cards require a lot of power to run.

1 Corinthians 15:3-4


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#5
June 24, 2009 at 14:40:15
"...because the Power LED for the hard drives will come on for a second then flicker out"

I meant to add that the power LED for the EMachines I worked on failed to work too after the PS damaged the motherboard. I'm confident that your power supply took out the MB in your case too. An LED doesn't take much power at all to light. If the PS couldn't power the LED, it definitely wouldn't power the fans either.

WinSimple Software
CompTIA A+ Certified


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#6
June 24, 2009 at 17:46:18
Did you happen to connect the other 4 pin power to the mobo? Usually near the cpu. That provides power to your graphics.

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.


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