I have an HP s3700y Slimline that over 4 years old. Unfortunately, it has the GeForce 6159 nForce 430 onboard graphics. After a couple of minutes everything freezes and the monitor displays fine colored lines. I purchased a graphics card to fit the low profile PCIex slot and the same thing happens to the system and monitor. Does this sound like the chipset is gone and a new mobo is in order? Thanks for any help.
sounds like you forgot to plug the video cable into the new card or forgot to power the card on and your still using onboard gpu.