Sound card and monitor issues

I am working on my buddies emachine not sure of model and I am installing a new sound card because the ondoard sound isnt working although windows says it is anyways when i put in the new sound card and boot it up the monitor wont kick on it acts like an irq problem but not quite sure any help or suggestions would be greatfully appreciated and very helpful.

thanks.

We really need the model number
http://www.e4me.com/support/product_support.html

And any other details, ie Windows version? New sound card manufacture and model etc etc.

a little more info

I can tell you the windows version is windows xp I will see what other information I can get you I know that the sound card was ordered off of ebay and its brand new

sound card info

the sound card is a 5.1 surround 4 channel pci sound host audio card its generic

here is the website with the pics and specs on the sound card
h t t p://cgi.ebay.com/5-1-Surround-4-Channel-PCI-Sound-Host-Audio-Card-CD-New_W0QQitemZ320263711662QQihZ011QQcategoryZ3701QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

just take the spaces out of http it wouldnt let me post a link yet

I believe the model number for the emachine is t2542 any help once again would be muchhhh appreciated

Emachine t2542 Drivers (Windows Xp Home) Intel® Celeron® 2.50GHz CPU

Intel 845G Chipset Driver

RealTek Onboard Network Driver

Realtek AC'97 Audio Driver

Video Intel 845GE

Conexant Modem Driver

User Guide

drivers do me no good need to find out why when I put in new sound card It wont initialize monitor onboard sound isnt working at all is it an irq problem and if so how do i fix??

Oh ok I posted all your drivers for nothing
Anyway, no the monitor IRQ (or rather Video adaptor conflict) wouldn't cause this.
I'd say go back and update all your drivers (!) And remove the old Sound driver first, from Add/Remove programs (and Device Manager)
I'd say it's either faulty drivers, or faulty card