Hi ppl

Just wondered if any of you can shed some light on this little pickle!

Bare bones my new build powers fine, fans are spinning drives are opening (physically)............I have just put in my new processor.........powers up for a second then goes straight off????

Any ideas im tearing my hair out :0(

let me know if you want my spec.

HUggy

Hi Huggy, Welcome to PC Guide.

Yes lets have your spec, thanks.

Did you fit a heatsink and thermal paste to the cpu ?

The below rules out any electrical short from case or screws under mobo, and easier to work on mobo.

Build the system out of the case on carboard/mobo box with only the power switch (off/on) and speaker from the case , heatsink cpu, video, one stick memory, and boot up - what happens ?

Then add back the rest - PCI cards, memory, hard drives one at a time and reboot after each one is added - whats happens ?

After all that and still no go, if you have spare to to swop out, try then.

Thanks for your reply.......

I tried taking MOBO out and going step by step, got power but again it shut itself off imediately ! Arrgghhh.

Here is my spec.....

MOBO: MSI KT6 Delta
CPU: AMD XP 3200
512mb of corsair RAM on two sticks (tried using one, same result)
Geforce FX 5700 LE128mb Graphics card
Jeantech case with 400w power supply.
180gig harddrive

Anything spring to mind??

I would be most greatfull....

Huggy

When you build it out of the case did you get any beep codes or screen messages ?

Have you connected all power leads to the mobo ?

Do you have, can you borrow a cpu of the same make/speed to try in your mobo ?

when building out of the case it was exactly the same, a normal beep when turned on then 2 seconds and its off.
Unfortunatley i dont know of anyone with a similar cpu (thati can get hold of)
A friend of mine thinks that my power supply is not high enough, its 300w............what do u think?

thanks

huggy

Is your CPU fan connected to the "CPU fan header" and not a secondary fan header??

When you installed the CPU did you remove the plastic film that protects the thermal pad??

well i have just tried a new psu @500w making no differece whatsoever! The cpu fan is in the port labled cpu fan, should it be in a different one?

If the CPU fan is plugged into the header labeled CPU fan, that would be the correct one. The fan's RPMs are picked up through that header. On most newer motherboards, if the RPMs are not sensed, they will shut down automatically to protect the processor.

I would follow Jiggy's suggestion above and keep the motherboard outside of the case on a non-conductive surface until you achieve a successful POST.

And, are we doing this "barebones?" Only CPU/heatsink and fan, Video card, RAM, Monitor, and keyboard...

Be sure to reseat a couple of times. If you have an AGP video they can be buggers seating completely into the slot. Recheck the RAM also...

What about the thin protective piece of plastic on the heatsink, did you remove it?

Have you tried clearing the CMOS? How about the CPU installation - anything wrong with that? Maybe something got under the CPU and is causing a short? Are you using AMD's stock HSF or was this an OEM CPU?

ok ppl

Just to update you - I have not got the cpu working fine, gave a quik clean and added some therml paste.seemed to make the difference, its been fine since!

Sods law then says there is bound to be another problem yes?

Yes!

I have a very striped, warped stormy screen, at first i would say this was down to the graphics card or screen. I have swapped screens and it produces the same result. Strange thing is that the screen was fine on initial boot but has been crap ever since. I am going to try an old graphics card in it now to see what happens, i will keep you updated.

Anyone got any ideas on that??

p.s thanks for everyones help so far.

huggy

The vid card may need to be reseated and/or cleaned. Try that first. If still no difference, does it do this only in Windows or also during POST? That may mean something if it only acts up in Windows. If everything is messed up, then the vid card would be the problem. Sods law must be against you if the vid card died just when you got the darn thing working! :p

thanks for reply.....

The screen only messes up once windows is up, i tried an old video card which worked fine for around ten minutes then the same happened! Nightmare, not really sure whats happenning here?? Very strange.

Any ideas on that old chestnut>?

huggy

"a normal beep when turned on then 2 seconds and its off"

Download a copy of my diagnostic flowcharts from here
www.erniek.eclipse.co.uk/downloads/sylvanderdiags.zip
and print them to leaf through.
Begin on the START UP chart.
This will show that you had a successful completion of the POST as indicated by the single short beep.
The video card should then have been enabled followed by a display of white characters on a black background.

Here's a typical and successful startup sequence
1. http://www.pcguide.com/ts/x/boot/walk/index.htm
2. Yes: The system power supply is functioning
http://www.pcguide.com/ts/x/boot/walk/power1.htm
3. Yes: Something is being written to the screen during boot up [This could be only a flashing cursor]
http://www.pcguide.com/ts/x/boot/walk/video1.htm
4. The video BIOS message is displayed on the screen for a few seconds and then clears from the screen, or more messages display under it
http://www.pcguide.com/ts/x/boot/walk/vbios1.htm
5. Yes: The system BIOS startup screen is appearing
http://www.pcguide.com/ts/x/boot/walk/bios1.htm
6. The memory test completes successfully
http://www.pcguide.com/ts/x/boot/walk/ram1.htm
7. The BIOS accesses the floppy drives and the boot continues
http://www.pcguide.com/ts/x/boot/walk/seek1.htm
8. The system is able to autodetect IDE devices successfully
http://www.pcguide.com/ts/x/boot/walk/auto1.htm
9. The system is not Plug and Play compatible, has no Plug and Play devices, or has PnP devices but identifies them properly
http://www.pcguide.com/ts/x/boot/walk/pnp1.htm
10. Boot sequence is A: before C: (floppy disk first)
http://www.pcguide.com/ts/x/boot/walk/seqAC.htm
11. The floppy disk makes a noise and the light comes on
http://www.pcguide.com/ts/x/boot/walk/fd1.htm
12. The floppy disk light goes off and the hard disk light comes on as it starts booting
http://www.pcguide.com/ts/x/boot/walk/fd1hdd.htm
13. The hard disk boot process will continue here, if you want to follow it.
http://www.pcguide.com/ts/x/boot/walk/hd1.htm
14. The system continues booting from the hard disk and the message "Starting MS-DOS" or "Starting Windows 95" is displayed
http://www.pcguide.com/ts/x/boot/walk/hd1os.htm
15. Operating System Loaded From Hard Disk. The system has found a boot sector on the hard disk and is now starting the load of the operating system. The hard disk is working. You have successfully completed the hardware part of the boot process. Any problems encountered after this point should be diagnosed by looking for a more specific problem with a component, or under the section that contains run-time error messages.

How far does your startup get before shutdown?

Oops, missed the tail end of the story. :o
I'll get my aging brain to work on that now.

Have you booted into Safe Mode to see if the basic video card driver and configuration settings is producing a good display?

Have the correct drivers been installed for each of the video cards used?
Are the video cards [hardware & drivers] compatible with the OS?