Got a MacBook Pro A1260 that won't start up 9/10 times. When attempting to turn it on, the white sleep button is blinking, optical drive makes noise, sleep button turns off, pause, turns on, then off again. No start up chime sound unless it SUCCESSFULLY turns on. The computer's battery is dead FYI. The charger is original 85w magsafe. I reset: SMC PRAM Re-seated the memory (more info below) Removed all memory - Let it beep 10 times - with a pause in between each beep. Signals firmware chip is OK. Took off the keyboard and cleaned the computer with my compressor Checked internal connections The first time I reset SMC, I was able to boot on the first try. The computer was fine when at the desktop, though it's warm to the touch. The memory in system profiler checks out as OK. I verified the Hard drive is good, etc. If I attempt to restart the computer, 9/10 times it will not restart; It just shuts off. Memory 4GB STOCK: Took out 1st memory module from SLOT 1 and it booted. Did not successfully restart. It did boot up via power button after shutdown. Second attempt to restart from desktop was unsuccessful. Put 2nd memory module from SLOT 2 INTO SLOT 1. Did not boot. Chimed on second press, got to regular Mac blue screen, then it went black. *Removed 2nd memory module* Put 1st memory module into SLOT 2 - successful boot. Did not successfully restart. Did not boot on first power press after shutdown. Did not boot on second power press. Did not boot on third power press. Put 1st memory module back into SLOT 1 - successful boot. Successful restart #1. Successful restart #2. Successful restart #3. Put 1st memory module back into SLOT 2. 4 power button presses NO BOOT. Put 1st memory module back into SLOT 1. 4 power button presses NO BOOT. - My guess here is the logic board is failing - a common problem with this model. The computer is currently ON with 1 stick of memory in. I had it running yesterday with both sticks in. Once I attempted to restart it, it would not boot again. Buying a new logic board for this machine is not worth the money. I am probably going to reflow the GPU. Any other suggestions?