Hey all, Yesterday my macbook stopped working, when i pressed the power button nothing happened. So I decided to open it to see if I could fix it. I've found the problem but it's a really weird one: If I connect the power supply and press the on button, nothing happens. If I connect the power supply, disconnect the battery and press the on button, nothing happens. But if I connect the power supply, then press the on button and after that disconnect the battery the macbook starts booting. Has anyone had this problem before and knows what's the part to replace? Thanks in advance, Matjas I've tried these solutions, but it didn't work.