Computer Problems

[pip_75]

I have been having a few problems with my computer. Sometimes when I restart the computer nothing will show up on the screen and it will make one long continuous beep. If I restart it again it will usually boot into windows.
I am guessing it is beeping because of some hardware problem but I have no Idea what is wrong.

Here is my computer info

XP Pro
Thermaltake W0101RU ATX 12V 2.0 Version 550W Power Supply
AMD X2 4200+ Dual Core CPU
ASUS A8N-SLI Premium
2 GB OCZ Ram
XFX Geforce 7600 GT 256 MB
Sound Blaster Audigy 4
Plextor DVDR PX-716A
Maxtor 6L300SO 300GB SATA
Western Digital WD3200KS-00PFB0 320GB SATA 3.0
Seagate 320 GB Sata HDD
Viewsonic VX922 19" LCD Monitor
Bose 2.1 Speakers
Thermaltake Armor Series VA8000BWS Black Aluminum/Steel ATX Case

 

[31computers]

1 long beep = memory problem. Try cleaning memory slots, and re-seating mem sticks, then reboot. Aim for 1 short beep on startup which is the OK signal