I have an SY-P4X400 DRAGON ULTRA motherboard and cannot get PC to boot. When I turn on computer, I get a bios beep then a black screen with no blinking cursor. I have replaced bios battery and reset bios and still nothing.

SOURCE: Turning off onboard sound card from bios

is in bios, on advance setings or something the same, or in integrated periperals, after u find him push enter or arrows keys to set on disable, this in most of the case fix the prob, and is a via cipset then i tink is a ac'97 integrated audio in moust of the case (sorry for my english) 

SOURCE: Need manual

Hello:
Get the information from the maker of this board.
you can download it all for free.

thanks,

Robert Nyilas

• 627 Answers
• Posted on Jun 29, 2009

SOURCE: I had a soyo motherboard SY-P4I865PE Plus Dragon

First o fall do a bios reset, by the jumper of the motherboard

Thomas

• 68 Answers
• Posted on Oct 14, 2009

SOURCE: I need the manual for a soyo sy kt400 dragon ultra

cant seem to find manual as soyo bankrupt but check this out if any help
http://hothardware.com/articles/Soyos-P4X400-DRAGON-Ultra-Platinum/

SOURCE: bios update

Get it direct from their website...Just looked for you. Site seems to be down right now. You can try downloading it from another site...but just be careful !!!