Magsafe has no light, MBP starts but just spins on the Apple Logo, more...
This is a friends 17" 2.16 model
Magsafe has no light but works, MBP starts but just spins on the Apple Logo, the battery has no charge. I have a 2.4ghz model so checked the charger... it works AND lights up on mine. The battery (a replacement battery, 8 months old) does not take a charge in my mbp (had it installed for 30"). I connected via firewire in Target mode - it didn't mount so I tried to "repair" the connected HD via Disk Utility.... after about 5" a simple message came up saying that it was unable to repair the drive.
Ran Tech Tool Pro and only managed to run scan blocks on it which at least mounted the drive so I could retrieve files etc but no other diagnostic would work.
Did a SMC on it - no change.
When I tried starting it and held down any combination of alt, control, shift keys etc it would just immediately go into shutdown.
Anybody have an idea what might be wrong and how much it might cost to repair?
Does your friend's 2.16 MBP have the original hard drive? If so, the hard drive could be failing. It would be 3 years old, and the useful life of a hard drive is 3-5 years.
Have you tried your known good battery in your friend's MBP? If the battery won't charge with a known good adaptor and a known good battery after a SMC, then there could be a problem with the Left I/O Board.
I have heard of a dying hard drive affecting the optical drive as well. If TTP was not able to do any diagnostic test, I am wondering if the problem might be with the optical drive.
The worst possibility would be a bad logic board.
Have you tried a PRAM reset?
http://support.apple.com/kb/HT1379?viewlocale=en_US
These are just some guesses. With a known good battery and adaptor cable, you may be able to determine if the Left I/O Board is OK. However, you may end up needing to go to Apple or an AASP for a real diagnosis. If you are anywhere near an Apple Store, you can make an appointment at the genius bar and get an evaluation for free. If it's just a hard drive or the left I/O Board, the repair should not be too much. If the logic board, it could be quite expensive.
Good luck!
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