Wont boot, turns off a couple of seconds after power button
Hi, so I was having issues 2 days ago where my macbook pro 13 inch was not booting properly(I had a boot disk snow leopard inserted) the solution was that I gave it a pram reset and I was able to boot. So I removed the disk and restarted my system and it worked just fine. I inserted the boot disk again and I had the same issue as before I couldnt boot. The system would just turn off before the chime(black screen). Again, I gave it a pram reset and it allowed me to boot. Im guessing that whatever determines where you boot from got confused or something. Nevertheless, I thought I was fine until I woke up today to try to use my mbp and it doesnt boot again, except the disk is not inserted. Im guessing its some sort of mothetboard issue which is weird since it was recently replaced by the apple guys. Heres what happens, I press power and after 7 missisipis you hear the computer turn off (like when you press the powerbutton to force turn off you hear that) and the white sleep light turns off but a second later turns back on and stays on. Nothing displays on the screen, it remains black at all times. The battery seems to be charging fine. Put my ear onto the mbp and I hear the HD running and I hear no beeps. I wanted to be able troubleshoot it my self but I need assistance with this one. Thank you for your time.