I replaced the graphics card tonight. When I booted up I got one longer beep and six short beeps, plus a no signal sign on the monitor. Decided to go back to old power supply, to see if maybe I ruined the new one. At first it booted up with no beeps, it loaded all the startup programs, but then it hung up on the "Detected New Hardware -- load CD or Disk...". Pushed the reset button and I get the long beep and six short beeps again. Turned off using button on power supply.
Waited five minutes, then tried it again. It booted up with no beeps and loaded all the startup programs (which isn't much, really) and then hung up again. When it hangs I can't use the mouse or keyboard. Tried reset button again and I got the 7 beeps.
I have an ASUS motherboard -- apparently the 7 beeps means a motherboard or processor problem in some brands but I can't find the beepspeak translation for ASUS. But if it's the motherboard or processor, then I wouldn't be able to get all the way through the startup programs loading, right?
I took the graphics card completely out and put it back in again, just to make sure it was in correctly. It's nice and secure so I don't think that is the problem. But, um, when I initially put it in I didn't have it connected to the power supply because my old one didn't need to be and then I got one huge long beep. But I figured out the translation for that soon enough. Please don't tell me I fried a brand new card?!