gigabyte ga-g33m-ds2r mobo causing a right headache!!!

[mad hatter]

my headache is this motherboard
gigabyte ga-g33m-ds2r
intel duel core processor 2.70 ghz
2x 1gb ddr2 g.skill ram
nvidia 8400gs 512 mb grafix card
hitachi desktar 320gb sata
psu jeantech 400w
o s win xp

problem started over a week ago when i tried to load the com up and it froze on the windows logo so i turned the com off
it now has started to just cycle trough powering itself up for like 2-5 secconds then turns off then repeats it
i have had the mobo oout on cardboard had evrything unplugged  like hd drives cd drives ram out grafix out so it was just the mobo plugged in
i have bridged the power conector to rule out the power switch also changed the psu to a win power psu 450w
bought a new intel duel core processor 2.70ghz
taken over 20 hours of reading posts on the web but with now answers
when i take evrything out and just leave the mobo plugged in and no processor in the thing boots up and stays on but if i put the processor back in the problem starts again i am having a total headache with this anybody got an idea what the hell is going on plz???

[Dark Mantis]

Hi and welcome to the Gigabyte Forum

Hey, it's not April 1st you know! 

With no processor installed the motherboard can't possibly boot up.  It is impossible!!

Have you checked to see if your BIOS version supports the new CPU you have ?

[mad hatter]

as far as i can tell the bios is ok and supported i installed the mobo over 4  months ago and all was working fine when i fitted it and i did a  bios update from the gigabyte site all worked fine for the next 4 months then as i stated it froze up and now this problem

[Dark Mantis]

bought a new intel duel core processor 2.70ghz

I thought you said that you had replaced the processor ?

[mad hatter]

yup done that and plugged it in but still goes through the 2-3 seccond reboot so cant even get onto the bios screen replugged the old processor in and still the same problem.  done also with the psu tried them on a different com and they are fine plug them back onto my mobo and the 2-3 seccond reboot starts all over again my old processor is a 2.20 ghz intel pentium duel the new processor is 2.70 intel duel i have ruled evrything out i can think of so would it be the motherboard that is the problem?

[Dark Mantis]

Look can you give me the exact part number of the CPU as Intel don't even make a  Dual Core 2700 unless you are talking about a Celeron.

[mad hatter]

old processor chip is intel pentium e2200
pentium duel-core
sla8x malay
2.20ghz/1m/800/06
Q746A400

the new processor i bought today is the exact same but 2.70 ghz

says on the box of the new processor e5400
freq. 2.70 GHZ
fsb. 800mhz
chache. 2mb
socket lga 775
pcg 06

thanks for the patience wiv me

[Dark Mantis]

Yes my bad it is a Wolfdale version. Your motherboard must be running F8 BIOS version or later for it to be supported.

What BIOS does your motherboard have installed ?

[mad hatter]

i have no idea what version of bios on it and i have no way of detecting it as the com only powers up for 2-3 secconds or so i have tried to short the cmos jumper when it powers up as i built the mobo up outside the case on cardboard when i short the clear cmos and hold the screwdiver onto the jumper it keeps powerd up but still no beep is heard finding this very frustrating thanks for all ur replies

[Dark Mantis]

Firstly you shouldn't short the CMOS jumper when the motherboard is powered up. It can cause damage.

Next it might be worth trying a new battery in the mobo, it should be a CR2032.

Can you replace your previous processor in the board to get it running and do a BIOS update ?

[mad hatter]

the batery is the same as you posted tried to use the old processor but same cycle results 2-5 secconds of power up will get a battery asap and see if that works will keep you posted thnks for all ur help

[mad hatter]

replaced the batery it now powers up for about 7 secconds then repowers back up and stays on no bleep tho and nothing coming up on screen have it all built outside the tower so should i now put it back together???

[Dark Mantis]

No I would leave it all outside on the worktop. It is easier to see and add components etc.

Have you got a buzzer installed ?

[mad hatter]

not sure abouta buzzer how do i check?? before the problem started on the boot-up i did get a bleep???

[Dark Mantis]

On the bottom right hand cornewr of the motherboard there is a connector block for the Front Panel Connections. there is part of that that is marked SPKR. If there is nothing attached to it then you do not have a buzzer and will need to get one to hear the POST code beeps.