GA-p35c-DS3R rev 2.0 stuck at post screen

Ok so i bought ga-p35c ds3r rev 2.0

put in following 4gb of ocz ram
http://www.ocztechnology.com/products/memory/ocz_ddr2_pc2_6400_platinum_revision_2_dual_channel

have a ati 1950pro.

put in core 2 E6550

using usb keyboard and wireless mouse (also usb)
http://www.microsoft.com/hardware/mouseandkeyboard/productdetails.aspx?pid=043
http://reviews.cnet.com/mice/logitech-mediaplay-cordless-mouse/4505-3148_7-30993260.html


sata hard drive and ide burner

and finally 485W enermax psu.
http://www.enermaxusa.com/catalog/product_info.php?cPath=21_46&products_id=110

yesterday i installed windows xp on it. was going to instal the drivers and i couldnt cause i needed to upgrade the xp to sp1 and or sp2. (dsl disconnected. thats another story )

so i thought i will do it later on. Turned off the pc and went to sleep. next day after work, i tried to start the pc but it just wont boot.

The welcome screen (where you see gigabyte logo and a line at the bottom saying tab takes you to post screen and del into bios etc) will pop up as soon as I power up the the pc and thats it. keyboard has a LED on it which is on so i know that motherboard is working. but no key stroke will do anything. So basically it will mobo will stall at the welcome screen.

I restart it (power buttons on the case work) and then nothing comes up. I unplug the ac cord and then connect it and the start the pc and the same welcome screen comes and nothing else happens.

I already cleaned the bios (by removing the battery) but nothing has changed.

I am going to do the ram test (will just try to boot with one stick in different slots).

and to remove the burner hard drive and all the other little things like hdd led and cpu led.

but for now i have no idea what is wrong with the mobo. I dont know the bios version cause i cant get past the welcome screen.

Please help......................