Hi! I have a 2009 era Macbook pro. After I connect it to the power (the green light is lit up) and then press the power on button, the laptop does not power up. I tried long press, short press, nothing works. No lights light up on the laptop when i press the power button, and there is no startup music or anything like that. This is the same whether I am starting with a battery or without a battery. As background info, I would like to add this; my laptop had the 'warping' battery issue; the battery became so warped, it was physically impossible to place it on a table. At that point I took it to Apple service, and they advised me to take out the battery and use without a battery till i purchased a replacement battery. At that time, and for a few days more, the laptop worked fine, without battery when connected to mains power. Then a few days later, it just wouldn't start. Thinking a new battery would solve the problem, I purchased a battery. Sadly, and as described above, the laptop does not power up, with or without the battery. Any ideas and suggestions, will be much appreciated!