After pressing the power button the mbps fan turns on and then soon after it turns off. The sleep light also turns on and then off. I troubleshooted as far as knowing that my hd works and so do the ram chips. Iwas beginning to think that it was to be a motherboard or perhaps an OS issue. The reason i thought it was an OS issue is that ever since I managed to boot about a month ago, I changed the settings in system preferences to never sleep. And the issue, hasnt happened. Then I upgraded from snow leopard to mavericks and the issue happened again but once I managed to get it to boot I changed the settings to never sleep. The issue began when I accidentally, manually closed the laptop into sleep. I believe its some sort of sleep issue. Usually, when ilet the laptop sleep if tried to wake it it wouldnt ever wake. Sometimes I would remove the ram and try to boot and it would give me beeps which is good because everytime I reinstalled the ram chips after hearing beeps it would boot. If I disconnect the HDand then press power the fans turn on and then off but the sleep light never turns on. I have an SSD installed that wasnt the original drive but I still own the original drive and I had the same wake issues with that. I did a clone recovery migration so if it is some sort of OS issue then it would be replicated in the new drive, I imagine. Inserting a boot disk has the same effect except you'll never recieve your disk back, the laptop basically said nom nom nom and ate my disk. Guys a pram test is out of the question since the laptop never chimes at all. From my experience you do a pram test when it chimes and you would see the sleep light actually flutter. Nevertheless, I tried it anyway It had no effect. I tried SMC and sometimes it boots and sometimes it doesnt. Theres no definitive correlation for me to say that its the reason that the laptop boots. Since, sometimes when I have the issue I give up and after hours or days I randomly press the power button and voila. The randomness of the issue is a clear indication that if i bring it to apple their 'technicans' will rule it out as a motherboard issue and then give me a large quote for a problem I shouldnt even be dealing with in the first place. im trying to figure out what the real issue is and if theres a way to troubleshoot the motherboard further. I really need to get the laptop running. Its my work station. Thank you for your time.