My macbook 4.1 wont boot up after a long storage period. I stored it for 6 months due to a broken Keyboard flex and after replacement the computer would start, check (by green light) the camera, the display would blink faintly the fan rotates and the white LED is on but would shut down after a few seconds. i replaced the thermal paste and the shutting fown after a few seconds stopped but still the screem remains black and there is no booting sounds meaning the computer is not booting at all even with a different hard disk. what could be the problem, i really need assistance. I have tried the PRAM reset, SMC reset, etc but nothing.
MacBook, Windows
7, macbook 4.1
