|So, I just upgraded my video card with a Radeon HD 4870 but after putting it in, the computer doesn't boot up. I also put it in new RAM, but I'm pretty sure it's just the video card messing things up. Even after I take everything out and put the old stuff back in, it still doesn't boot. The mouse doesn't work, the keyboard doesn't, the screen is blank, etc. I'm not computer savvy in the least so I've no idea what to do to get things back to normal. Any help would be greatly appreciated.|
Thanks in advance.