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Computer not starting; no BIOS, no beeps, but fan works.

Ungenious
Ungenious asked
on
Medium Priority
2,491 Views
Last Modified: 2012-05-04
Problem:
     I have an Alienware desktop (1 yr. old) that recently crashed while playing a game (Half-life), I heard a loud, continuous beep through my headphones when it froze & I hit the power switch on the front of my comp.  
     When I tried turning it back on, I got nothing; the display showed a blank screen (but not the "No Signal", just blank), the yellow LED light on the front lights up & flickers, I see my DVD light flicker (it also opens when I push the button), and my fans all work (2 rear, 1 side), but the green LED light on the front of the case stays dead.

Troubleshooting:
     I have an identical setup so I was able to swap & test.  I frist tried swapping the RAM w/ no effect, then I tried the video cards, then CPU.  I couldn't get the HD off of the working comp, so I just tried unhooking both HD's and the working comp went to BIOS while the broken one just did what it had been doing (nothing).  I've also tried switching the thick black power cord.      
     I could see no visible burns anywhere on the motherboard, however I noticed some amount of static electricity on the chassis; enough where I brushed the inside of the case with my forearm and thought I cut myself slightly.  The case was not opened while it was running & subsequently crashed.  My computer is sitting on a rug ontop of a tiled stone floor (which my house's entire flooring is covered with).

Specs:
     CPU..............dual Intel Pentium 4 3.06GHz
     Memory........1024MB
     HardDrive......80.1, WDC WD800JB-00CRA1
     DVD-Rom......Samsung DVD-Rom SD-616T
     OS................MS Windows XP Home Edition
     BIOS.............Award Software, Inc.
                         ASUS P4T533-C ACPI BIOS Rev. 1
                         ASUS   -42302e31
     Video............ATI Radeon 9700 Pro (128MB)
     Sound...........Creative Labs Sound Blaster Audigy 2 Platinum
     
Conclusion:
     From what I've read online so far (not much), it seems maybe my motherboard or powersupply is shot.  I haven't tried taking out my CMOS battery or changing powersupply or motherboard yet.  Your help is appreciated (but the max point value I can give is 500), thanks in advanced.
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I agree with Snow guy here.


if you change out the power supply with a known good one from a friend and it works.  Then I would recommend that you purchase a HIGH QUALITY Enermax power supply.

Author

Commented:
Thanks guys, I will try swapping PSU & points should be awarded soon enough.

Author

Commented:
Well, I've tried swapping out the PSU & connected mine to the working comp's mobo and vidcard.  & the working comp still worked (BIOS worked & it asks for a system disk as I didn't hook up the PSU to the HD).  So now that I've tried swapping every single working component (including monitor) from one computer to the other, except for the motherboard... Infact I still have my broken comp's RAM, CPU, and vidcard on the working comp from the swaps.  There's really no point in swapping the motherboard, as I pretty much already have.

I'm going to award the points to Snowguy.  But thanks to everyone for their input.  If you feel like posting a comment on recommended mobo replacements/upgrades or any advice on that matter, I'd appreciate it.

Author

Commented:
*EDIT*

Didn't realize you could split points, so I gave some assisted points to RCMB.  However Snowguy had the most thorough answer.

Commented:
Thank you, I take it was a bad PSU?
Have you checked your power voltage button in back of pc?  Sometimes it can get flipped into the wrong voltage.  Should be 110 or 113, not 220.  If it is set at 220, you will get no beep and nothing

rjones119
as u have mention u had removed the cpu fan ..
what i belive is that ur cpu is not plugged  in properly ...
for that remove the cpu and fit it again and try switching on the comp .. this should work
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