MacBook Pro 17' 2.66 GHz
Mac OS X 10.6 Snow Leopard

My MacBook Pro has been working fine after I installed Snow Leopard but today when I tried turning it on the LED starts flashing and I hear a beeping sound. The screen turns on but there is no Apple start up logo. Also, there is no "?" on the start up screen. I've tried...

o1. FUNCTION + APPLE + P + L
o2. APPLE + OPTION + P + R
o3. SHIFT + CONTROL + OPTION + POWER

...but it doesn't seem to be working and I'm not sure if the problems on my MacBook Pro are the same as on the "Instant fixes" thread since it DOES turn on but doesn't boot the Apple start up logo and suddenly starts to beep.

Should I go to the Apple store and try letting them fix it or is there an easy way out of this?

Thanks

PS: I'm not sure if this matters, but I just fully charged the MacBook Pro so I don't think it's battery problems...