I installed a brand new NVIDIA Galaxy GeForce 8400 GS video card into my computer, and when I booted it up, it gave me a different boot screen. Not odd, but I recieved an error message. The boot screen said, "Intel Boot Agent GE v1.2.28 copyright 1997-2005 Intel Corporation Base Code PXE-2.1 Build 084." and the error message I gotw was, "PXE-E61: media test failure, check cable. PXE-M0F: exiting boot agent." I tried to remove the card and reboot so that I could research the issue, but my computer will no longer boot even without the card installed. I get the error message no matter what. A kind friend of mine did a little search, and apparently there are four causes for that message: bad CMOS, bad BIOS, a bad or non-bootable HDD, or non-bootable removeable media in the computer. Seeing as my computer was functioning just fine right before I installed the new card, I think my BIOS, HDD, and CMOS are all fine. I did, in fact, have a non-bootable CD in my drive, but the problem persisted after it was removed. I will be returning this card. I tested it in this computer, and it caused the boot issue. It will not fit in the case I bought it for, so I'm going to exchange it. What I really need to know is what's causing the boot problem and how to fix it. I apologize for the complete lack of line breaks, but I'm typing this on my sister's DSi since my PC won't start up. Thank you for taking the time to read this, I hope there's a quick solution.