PC boot problem

Matteysan

Matteysan

Matteysan

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Joined
15 Nov 2004
Posts
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Location
Telford
Can anyone shed any light on this?


I've taken this from another site because it is the exact same problem but his was a new motherboard not being compatible, Bare in mind this system was working perfectly fine this morning & has done for 3 months, I only powered down to add some new ram I got from another member on here.


On power up all case fans start, the cpu fan starts but at a lower speed, and the psu fan starts as well. The LED on the motherboard light up. After about 3-4 seconds on, the power goes off. After another 3-4 seconds the system comes back on by itself and this loop continues until I switch off the psu or pull the plug. At no point do I get any POST beeps or video output. It sounds like the cpu fan is only at about half speed & it was always louder than that when starting before.

To my specs before the problem started:

E6300 C2D @ 1.86ghz
Asus P5K-E wifi
2x1gb OCZ PC2 6400 4-4-4
2gb corsair value stuff
8800GTS 512mb
500GB Samsung HD502HJ Spinpoint F3 SATA
80GB Seagate IDE
OCZ 600wSXS

To specs when problem started:

E6300 C2D @ 1.86ghz
Asus P5K-E wifi
2x1gb OCZ PC2 6400 4-4-4
2x1gb OCZ PC2 8500 5-5-5
8800GTS 512mb
500GB Samsung HD502HJ Spinpoint F3 SATA
80GB Seagate IDE
400GB Seagate IDE
OCZ 600wSXS

I have tried bare bones, removing battery, trying 1 stick of ram of each kind, re-plugged everything in, different gpu. The only things I haven't tried is my other CPU & a different PSU cause I don't have one :/

I don't understand how changing 1 stick of ram for 2 others could cause this? Even going back to the old config doesn't work.
 
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take the ram and cpu out, boot pc and nothing, power off

then remove cmos battery and use jumper pins to clear cmos, leave for 5 mins

insert old ram and cpu, then put jumper and battery back in.

boot PC and get ready to hit delete.

now i can tell from your post you know all this, but i suspect your new ram has confused the boards timings.

i have tried this in the exact order above and had results
 
Just tried that mate & thanks :)

But it didn't work :(

Still the same cycle.

[edit: Tried a different C2D 2ghz cpu, with 1 stick of 6400 OCZ ram & 8500GT. Still the same]
 
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I had this once, and had to manualy reset the bios to automatic and something else, but can't remember what.

Maybe not the problem but worth a shot.
 
Thanks guys, I don't know what you mean by manually rest the bios to automatic Fob do you mean removing the battery?

I have a friend coming down shortly with another PSU so I'll give that a try.
 
Google the paperclip test. You can short the PSUs 24pin block to trick it into powering on. If it fails without any devices attached you'll save your mate a trip ;)
 
Troubleshooting hell indeed!

While waiting for my friend to turn up. I tried my old motherboard, 1 stick of ram & 8500GT. PSU stays on with this setup but still don't get any display, tried the 8800GTS also still the same, Different cpus also tried.

Power Supply it is I think! Can't have 2 dead mobos, 2 dead cpus, 2 dead gfx & 5 dead sticks of ram that just isn't possible or is it haha.

[Edit: Definitely the PSU time to get a new one heh]
 
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