Hey, My friends old macbook 2010 pro wont boot ( 13inch version ) http://www.everymac.com/systems/app...o-2.4-aluminum-13-mid-2010-unibody-specs.html He didnt use it in some time so i dont know is there any water damage example, opened back side and looked for corrosion and didnt see any atleast on back side of motherboard. Re-connected every cable on back side of motherboard, Nothing looks to be broken. I removed battery cable and tried to boot and nothing happens, no fans or any sounds. Power cord has green light stable when plugged to macbook, thats only light im seeing. I got some life into it when i press power button for 10seconds then connect power cord to macbook ( it has no light at all when i do this ) keep pressing and after 10sec i re-press power button. Then i can hear fan noise at full speed, dont have HDD connected so cant say if that would spin, First time i did this, heard some kind of error beeping sound, nothing after that, screen stays black. If someone could help me troubleshoot this? Thanks in advance!