Shut down after 2 seconds?

Hey!
I recently came back from holiday and, after leaving my MacBook off for about a week, went to turn it back on. Pressed the button, optical drive made its noise, and then the whole thing shut down (with the HDD making that whistling sound as it slows down). It then refused to power up, with or without mains/battery in any combination.
I've attempted a P-RAM reset and SMC reset, but to no avail. Weirdly, though, if I leave it alone for a while, and then attempt to start it again, it may run for 3 or 5 seconds, but inevitably shuts down again even before the chime.
Has anyone else had such an issue, or does anyone have any idea as to what it may be? I fear my logic board may be dead, but I can't understand how that could have happened by not using it...
Any feedback greatly appreciated =]

HI lukeyroo ,
welcome to the forums. I'm sorry to hear about your power issues.
You may want to check out:
Apple Portables: Troubleshooting MagSafe adapters
http://support.apple.com/kb/TS1713
because battery or no battery an issue with your power adapter could cause your issue.
Also when you try to turn it on dose the sleep light blink, and or do you hear a series of beeps? if so how many beeps?
if you do hear a series of beeps/ sleep light blinks. you might want to check out http://support.apple.com/kb/ht1547
let me know if this helps; or if you have any questions. the results of these trouble shooting steps could say allot about your issue.
-tt
Message was edited by: TeenTitan

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