Im so frustrated! I have a Gateway GT5662 desktop pc standard with 3gb ram, 500gb hd, AMD phenom 9500 quad core processor, ATI Radeon hd2400xt vc, and windows vista home edition 32 bit os. Anyways I decided to grab a 1g ram stick and replaced one of my 512mb modules with the 1gb module to give my system a total of 3.5 gb ram instead of the standard 3gb. Well I open up the pc swap the modules put it back together and fired it up. Well the gateway start screen pops up and then you see the little load bar "the screen right b4 it prompts you to enter your password" and then BAM! My monitor says no signal. I use my 32" hd tv as my monitor and I hook it up with a hdmi cable using an adapter that came with my video card. I have uninstalled and reinstalled all video drivers still with no luck. I have never had a problem b4 I added the extra ram. I took the ram out even and replaced all default modules with still no luck. I know the card is not fried because i just tested it on a friends pc and it works just fine. However when i do have the ATI card in my pc I can boot it in safe mode just fine without the monitor losing signal. I just cannot start windows normally when hooked to the card only in safe mode. However I currently have my card removed and running my pc via vga to my monitor using my on board graphics with no problems at all. This is with the extra ram module and my system info is correct saying I now have 3.5gb ram. I just cannot seem to get my video card to work now. Someone told me to try something like disabling my on board graphics to see if that works. The thing is when my graphics card is installed I cannot use my on board graphics anyways because I believe when a video card is inserted in my pc it automatically disables my on board graphics. Im just so confused because the main reason I upgraded my ram was because I wanna play COD4 all damn day! lol. Someone please help I really want my video card to work.