MacBook Pro no startup sound, and not able to start
My MBP A1260 just died, nothing special lead up to this. It have been trustfully been working for 2.5 years.
No startup sound or picture, though the superdrive does it regular startup thing, the fans start (normal speed) and the on/off light comes on when I power it on. This is what I have tried:
- Startup with external screen
- Disconnected all external devices
- Reset PRAM and SMC
- Power up with or without battery
- Startup without RAM and tried on by one of the ram chip's
- Opened it up and tried starting without:
- Hard drive
- iSight camera
- Disconnected-connected all accessible (from the "top) connectors
I even coneccted an older battery to check if the poweradaptor is able to charge it, and that looks OK.
Currently running out of ideas here, anyone? I'm I looking on a dead main board here?
Best regards Stein
I can't tell if you've done exactly this: remove the battery, disconnect the hard drive, connect the MagSafe, insert your system installation disk and try to start holding down the "C" key. Did you get anything? You've done a very good job of testing. Press the button on the battery to see if it is charged. Are you getting a light on the MagSafe?
The answer is none of these, really.
"In July 2008, NVIDIA publicly acknowledged a higher than normal failure rate for some of their graphics processors due to a packaging defect. At that same time, NVIDIA assured Apple that Mac computers with these graphics processors were not affected. However, after an Apple-led investigation, Apple has determined that some MacBook Pro computers with the NVIDIA GeForce 8600M GT graphics processor may be affected. If the NVIDIA graphics processor in your MacBook Pro has failed, or fails within four years of the original date of purchase, a repair will be done free of charge, even if your MacBook Pro is out of warranty."
http://support.apple.com/kb/ts2377 <---click for more info
The problem is, the GPU gets so hot, it physically unsolders itself from the board. Luckily, Apple extended the warranty so you are eligible for a new one :)
hope this helps!!