Stuck at motherboard screen and can't load windows

Hey guys, first off here are my specs

Motherboard - Gigabyte S-series GA-X48-DS4, Ultra Durable 2
RAM - 4 x Corsair 1024mb RAM
Processor - Intel Core 2 Guad Processor Q9400
Video Card - Nvidia GeForce 9800 GTX
HDD - Western Digital 500gig
Power Supply - 700 watts ,Model 700SEL, Fan Controlled EPS 12V PowerSupply
Keyboard - Logitech G15 Keyboard
Mouse - Logitech G13 Laser Mouse

around November last year when i went to switch my computer on, it would power up then turn off around 5 seconds (before it could load up the motherboard screen). It did this continuously until eventually it would load up, start Windows Vista and i was able to access my computer. The time it took to finally load up randomized, between up to half an hour to booting up first time around. About 1 month ago after moving houses i set up my computer, plugged it in etc. However this time when i went to turn it on the same problem occurred it would power on off on off, but this time it never booted up. I got a new CPU (the CPU listed above) to try and fix the startup problems, but the same problem occured. I tested again, this time without a stick off RAM, and it managed to start up, however it got stuck at the motherboard splash screen. At the mb screen im unable to use my mouse or keyboard. I've tried putting the old CPU in, and trying to start up but i still get stuck at the splash screen. When i have the new cpu in, sometimes I'm able to get past the motherboard screen, and i go to run the windows vista disk, to re install windows, but when it goes to load up the disk, it comes up with the blue screen and wont progress any further. Ive tried running the disk through the commands on the splash screen, and gone into bios and made it run from CD rom first. However it continues to get stuck at the blue screen, or an error.

Currently I'm stuck at the motherboard splash screen again :sigh:, and i don't know what i should do. Any advice to solve my problem would be greatly appreciated.

Thank you :grin:

 

I would try a new PSU. That psu sounds really low quality. What is the brand of it?

If that doesn't help the problem I would blame the motherboard.

 

Hmmm, not really good forum etiquette posting your problem in multiple forums at the same time. It can result in conflicting advice to the poster and confusing results for those helping.

http://windows7forums.com/windows-7-hardware/44753-stuck-motherboard-screen-cant-load-windows.html