Computer suddenly turns off after turning it on?

Question

I'm building a computer for my aunt right now and she has all the parts seperate and we bought the case. We've put all the components in but when we turn it on, the computer suddenly turns off. Sometimes it turns off right at the second we turn it on and sometimes it loads up all the way to 'no boot device' (since we have to Windows installed on it yet) screen. But it just randomly turns off. Sometimes we even see the error 'CPU temprature error'. But the fan looks to be working perfectly fine. Also, the power supply that we put in is a 20 pin one while the mother board takes a 24 pin one.

Here are the specs:

Pentium D 3.20 Ghz
1024MB RAM
256MB GeForce 7300 GS
80GB IDE Hard Drive
380W Power supply

Motherboard: Asus p5pl2-E
Power supply: Green Power

Answer 1

yes if the power supply is wrong get the right one ... recheck the manual to be sure a supplemental power connector isnt required somewhere else on the motherboard ..

Answer 2

First off, the error tells you that your processor is overheating immediately after powering up the computer and it shuts itself off to prevent possible damage. This can be caused by two similar issues, the heatsink and cooling fan purchased is not rated for the processor you are using, and/or when you installed the heatsink and cooling fan on the processor you didn't use any thermal paste in between. What happens without the thermal paste and using a generic heatsink/fan combo is even though it is locked down, there is an air gap between the heatsink and the processor with no airflow to vent the heat from the processor away, so the processor is overheating. Thermal paste should be used sparingly, using more than a 1-2mm layer on the processor defeats its purpose, but is usually required to transmit the heat from the processor to the heatsink/fan combo for cooling. Here is a heatsink/fan combo rated for 775pin processor Intel processors upto 3.8ghz, this is an example of a low end cooling unit. Here is an example of a more high end cooling unit rated and designed for optimal cooling: http://www.mwave.com/mwave/viewspec.hmx?scriteria=BA24001 . Now, for thermal paste, here is what I would recommend using: http://www.mwave.com/mwave/viewspec.hmx?scriteria=BA19642&RSKU=BA19642 .

As for your power supply, you really need to use a power supply designed with a 24pin main power feed, just because a 20pin main feed will fit, you are not necessarily providing the required power to your system board, processor, or other addon cards attached to the system board. Here is a link to a Thermaltake 420watt power supply that is certified for intel processors with the correct connections: http://www.mwave.com/mwave/viewspec.hmx?scriteria=BA22089 .

Answer 3

You need at least a 500w Power Supply for todays PC demands.And one with the correct Pin Out.
It's a wonder you havent toasted your motherboard or power supply. Usualy the connector melts where the main power supply plug goes when there is a lack of amper demands.

And raise the temperature settings a little in the PC Health or something similar in the BIOS settings.
d:o)
Avatarxz

Answer 4

Make sure you have a CPU fan with thermal grease. Take everything off the motherboard and clean them carefully, then put it all back in. Try a new power supply.

Answer 5

You have the wrong power supply. Get one of these:
http://www.frozencpu.com/products/1139/cab-69/FrozenCPU_20-pin_to_24-pin_ATX_Power_Supply_Cable_Adapter.html?tl=g2c38s428
or a different power supply. Also make sure your 4 pin connector is hooked up to motherboard as that powers your cpu. Don't attempt running it until you get that 20-24pin adaptor or different power supply.

Answer 6

Try using a new power source or getting 24 pin

Answer 7

Your CPU cooling fan is not seated properly OR you need to use CPU thermal grease between the CPU and the cooler.

Remove and re-install the cooler. Here's the Step By Step:

Answer 8

1st check all the connector are properly connected to motherboard.
if "CPU temperature error" comes then make sure that u properly installed processor, There is a layer on new processor as well as in motherboard CPU slot, make sure u removed both the layer.
& still problem exist then its probably a short, try to make sure that mother board & cabinet doesn't short.

Answer 9

most likely didn't use einough cooling paste when you mounted the cpu fan.
second, if you want your computer to run well you should use a power supply with the right connectors and at least 450W....the one you have will probably crash within the next six months

Answer 10

With your specs,everything is fresh.Maybe your PC has been attacked by a virus.Get an anti-virus like panda 2007 at downloads.com.