Computer will not boot

June 3, 2010 at 15:40:39
Specs: Windows XP, Pentium 4 / 2x 512mb DDR400
PC basics: Pentium 4 processor, 1 GB ram, 80GB hard drive, LPJ2430W power supply.
Problem: When I press the power button the computer attempts to boot for about .5 seconds then turns off. Processor fan turns one revolution and green lights turn on on the front of the PC then turns off.
Fixes I've tried: 1.Replaced power supply with identical model - Issue still remains.
2.Replaced fan and heat sink (I broke a tab so I boughts the same exact model). -
3. Reset CMOS using (http://www.wikihow.com/Reset-Your-BIOS)

Thankfully this is not my primary computer, but never the less I want it to work again. Any ideas?


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#1
June 3, 2010 at 15:46:34
You try switching the ram into a different slot?
Also is it one 1GB stick or two 512MB sticks? if two, try booting with only one.

Also, i assume this computer worked at one point...what were you doing when it stopped working?


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#2
June 3, 2010 at 15:52:53
I have two 512mb sticks. I will try swapping positions and removing one to see if it makes a difference.

You're correct it has worked perfectly for the past 3 years and about a month ago it started intermittently shutting off. Ran virus scan and found nothing... One day the PC decided not to turn on.


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#3
June 3, 2010 at 15:59:01
Alright just moved around the RAM and no luck...

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Related Solutions

#4
June 3, 2010 at 16:35:20
What fan did you replace, the heat sink fan or case fan?
What type of PC?
Type of Motherboard?

When you replaced heatsink, did you use Thermal Paste on
it?

Did you check motherboard capacitors?

http://www.thenakedpc.com/dan/Bulgi...

http://www0.epinions.com/content_39...


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#5
June 3, 2010 at 17:26:29
-I replaced the heatsink and fan
-Homemade PC (a good friend of mine built it over 3 years ago)
-Motherboard = P4M800-M7 Rev 3.1
-Yes
-No I will try this next

Thank you!


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#6
June 3, 2010 at 17:28:07
Capacitors are all good.

Any additional ideas?


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#7
June 3, 2010 at 20:47:41
Try booting up with just one RAM stick, and try different slots. You might also try loading optimized defaults in the bios.

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#8
June 4, 2010 at 05:03:06
kx5m2g - Thank you for the advice. I've tried booting up with one stick of ram and no luck.

Optimized defaults in the bios?? Is that referring to removing power and moving the jumper to reset? If so I've already completed that as well.


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#9
June 4, 2010 at 07:15:11
Is that referring to removing power and moving the jumper to reset? You should remove the CMOS battery also. Then when you go back into the BIOS, you have to choose to load optimized defaults and then save that.

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#10
June 4, 2010 at 08:32:11
BUMmer....

I'd check:

- CPU again, make sure it's fully seated down in the socket.

- Boot system only with power supply attached, NOTHING
else attached - no RAM, no peripherals attached via power or data cables (no DVD/CD,
HDD, floppy etc) nothing.

- Boot & see if you get beep error or stop error codes with no RAM in the MB.

- If you get beep codes try putting the ram back in to see if
system recognizes the RAM, then try test RAM with memtest in the PC or a different PC:
http://www.memtest.org/ or Windows memory tester:
http://oca.microsoft.com/en/windiag...

- If RAM is good, connect one peripheral at a time and test
boot; 1st the HDD, then Floppy (if you have one), then DVD/CD ROM
etc.

Just another stupid saying...


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#11
June 4, 2010 at 15:08:28
kx5m2g - Sorry I forgot to mention I took the battery out too.


PC GEEK - I took off everything that I could think of. Sorry I'm not too into hardware just trying to figure it out as I got. Could you tell me if I disconnected everything by these:
#1 - http://i67.photobucket.com/albums/h...
#2 - http://i67.photobucket.com/albums/h...
#3 - http://i67.photobucket.com/albums/h...

With all that you see disconnected I still get the same issue. I also just noticed that when power is connected the front yellow light is on, dim but on. Any help would be appreciated. Thanks!

Daniel


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#12
June 4, 2010 at 15:11:04
Did you connect the cpu fan (probably 4 pin) ?

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#13
June 4, 2010 at 16:31:10
Per photo IMG00062.jpg, yep, all's disconnected. If it doesn't
fire there, it's either MB, CPU or PSU.

That socket 775 and 4 push/twist posts can be tricky to snap
down correctly. See this
http://www.beginnerspc.com/articles...

Make sure the posts are ALL the way down, THEN you turn
and lock them into place.

Here's your MB info:
http://www.biostar-usa.com/app/en-u...

Yellow light on front is what exactly....power button?


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#14
June 4, 2010 at 17:47:49
PC GEEK - I wasn't too generous with the thermal paste... Could that make a difference?


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#15
June 4, 2010 at 18:06:26
I forgot to mention the yellow light for pins 1-3 which is the HDD LED

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#16
June 5, 2010 at 09:56:25
RE: Thermal paste, I doubt it. You should use grease in a thin
film across the CPU to cover it, any less is too little, any more is
too much.

Re: "I forgot to mention the yellow light for pins 1-3 which is the
HDD LED"

Pins where?

Just another stupid saying...


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