PCI dose not seam to detect my graphics card after NETFRAME 4.0 Update

Hello. I'm really new to this thread, and this just happened 18 hours prior to this post. I had to reboot my Windows XP (32 bit) After i downloaded NETFRAME 4.0. When i did, my pc hummed to life, but my monitor (A E19T6W) registered that my GTS 250 1024 MB Card was not reading. I check multipul times, looking at the graphics card as it runs. The fan works like it normaly does, but the display is not working. I am now running on my intergrated motherboard (Asus A8N-LA) Which is a Nvidia GeForce 6150 LE, and i do not know what to do. I tried removing the mobo battery for 5 minutes to reset the board, nothing. Ive tried to reinstall my drivers, That does not work. I Removed NETFRAME 4.0. That dose not even seam to help any. I do not hope it is a bad PCI slot, (had the motherboard for 3 years) but are there any suggestions available? Anything would be nice.:)

My specs are

System Manufacturer/Model Number: Compaq sr1901wm
OS: Windows XP 32 Bit
CPU: AMD X64 3600+ DUO
Motherboard: Asus A8N-LA
Memory: 1.75GB DDR
Graphics Card: Nvidia GTS 250 1024MB
Sound Card: Soundblaster 24bit
Monitor(s) Displays: Emachine E19T6w
Screen Resolution: 1440x900
Hard Drives: 1st Seagate 80GB
2ndSeagate160GB
PSU: BFG Tech 550 WATT

Well im letting my friend install it into his 750 watt pc, to see if its power issue. I doubt it is the PSU for i have had it for around 3 years, but somehow, lately it has been going power out since about 3 months ago when i do heavy gaming. So it might be the problem, and BFG support seams to be gone now ^^" so im letting my friend borrow it. Just for 4 day.

Ive had it for about 3 years now, and i just noticed a switch on the back. i never did take the time to wonder what it is. But it seams to have 2 options and its red. Im sorta nervous what it does. It has 2 settings, 150, and then 230 i think. Im not sure what that means, but its a red flick switch. Does this help control my power? its set on 150.

it might be. I wont know for sure until i lend it to my friend tomorrow. Im heading over there where he has a great Azza computer where its fit with a sniper mother board, 750 watts, and a GTX 580. I hope my graphics card is compatible with the motherboard (which it should honestly) But if it was a power supply issue, wouldn't i get a brown screen at start up, indicating a power supply problem?

Yah, it would be horrible if my graphics card was faulty, but i have had it for 2 and a half years with hard end gaming: or even worse, my mother board. I would have to have to buy one at a time like this, with new RAM that goes with it, or possibly a CPU that fits. I wont know until tomorrow, so ill keep this forum updated on the problem.