Presario cq50 i think may be stuck in hib...

presario cq50 i think may be stuck in hibernation ... i power on and i get power led and gharge led ( if i have charger in ) i have tried the HDD RAM and battery in another cq50 and all work fine i have managed to boot into windows a number of times and tried normal shut downs when i go to power on again im back to having leds and power but nothing on screen and HDD light flashes and then stays off
it might be worth mentioning that when i managed to boot into windows i had the screen only half open so i could see my screen on my desktop while i googled for answers.. it may evn be something as silly as the hibernate pin being stuck but on cq50 it is hidden and although i did take this notebook to pieces i dont know where it is ( it is back together now and working as i managed to boot into windows after taking apart and putting together )