Ok guys going to go into a little detail what's going on. I have the board view up and the schematics. So I have repaired many of these 2009 17" boards in the past month and they all have the same issue...NO BOOT which is a root cause of the Poly CAP.
So this board same issue right? NO BOOT! SO I replace the Poly CAP with the proper 330 UF cap. And voila the board boots the fans...or so I thought this was solved...then come to find out there is no chime, no USB power, and no screen display. Now I Know the screen is good by visually inspecting it...ok so what gives?
Did a little research and some have said that these have some issues with the EFI ROM Chips...ok I took a donor board swapped that out and still no post...fans still spin and no chime. The fan does do one thing though...they will turn on...then turn off then turn on again and stay on permanently. Again there is NO chime, and no post or even a display. And yes the fans turn on and the CPU is getting hot etc. Even the heat sinks are heating up as well (the heat transferring over). I am at this point lost. Can someone maybe inform me on what it could be? Part location? I am at this point lost and confused! Also I am certain this is an Early 2009 MacBook Pro 17" I can update you guys if its a mid 2009. Any advice will help.
So this board same issue right? NO BOOT! SO I replace the Poly CAP with the proper 330 UF cap. And voila the board boots the fans...or so I thought this was solved...then come to find out there is no chime, no USB power, and no screen display. Now I Know the screen is good by visually inspecting it...ok so what gives?
Did a little research and some have said that these have some issues with the EFI ROM Chips...ok I took a donor board swapped that out and still no post...fans still spin and no chime. The fan does do one thing though...they will turn on...then turn off then turn on again and stay on permanently. Again there is NO chime, and no post or even a display. And yes the fans turn on and the CPU is getting hot etc. Even the heat sinks are heating up as well (the heat transferring over). I am at this point lost. Can someone maybe inform me on what it could be? Part location? I am at this point lost and confused! Also I am certain this is an Early 2009 MacBook Pro 17" I can update you guys if its a mid 2009. Any advice will help.
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