Currently Being ModeratedFeb 15, 2013 5:47 AM (in response to joeck)
.. I have an Early 2008 MBP and M/L runs fine on my machine.. pull the battery and power cord.. try a PRAM and an SMC reset.. this could be a coincidental video failure.. try rebooting from Recovery mode (Command + R at restart).. after this take it to an Apple Store genius for a look.
Currently Being ModeratedFeb 15, 2013 12:47 PM (in response to joeck)
Alternatively, restore your previously good SL installation and see if the problems persist.27" i7 iMac SL, Lion, OS X Mountain Lion (10.8.2), G4 450 MP w/Leopard, 9.2.2
Currently Being ModeratedFeb 16, 2013 7:28 AM (in response to Barney-15E)
Unfortunatly none of the suggestions above worked. It seems like the boot sequence is somehow damanged, and there for all recovery / alternative boot options are not working. is it possible to remove the harddrive reinstall mac os on it in order to repair any damages? Or is the EFI bootloader stored on some ROM in the machine?
And is it possible the the hardwrare got damaged by upgrading? How is this possible? Thanks, for your help.
Currently Being ModeratedFeb 16, 2013 10:54 AM (in response to joeck)
Well wiping trhe Harddrive clean and reinstalling mac os did not work either. I am confused, what could possibly go wrong when upgrading to Mounatian Lion?
However, your graphics card or something else could have failed coincidentally during the install. The install might have stressed that component to the point that it failed.
Currently Being ModeratedFeb 16, 2013 11:07 AM (in response to Barney-15E)
That might be the case, but as I mentioned in the beginning the keyboard is not responding to any action (caps lock is not even showing a green light). So I guess it must be something wrong even before the system boots.
Ah I also have 3rd party ram build in, could that be an issue, in combination with an Efi upgrade, does Mountain Lion/ Lion upgrade EFI?
Currently Being ModeratedFeb 16, 2013 12:13 PM (in response to joeck)
I don't know why bad RAM would cause that problem, but it could be.
If the keyboard isn't working, then I would assume a major hardware failure of some sort.
I don't think anybody here is going to figure out a solution. Need to take it to a service center.
Currently Being ModeratedFeb 16, 2013 12:28 PM (in response to Barney-15E)
Well yes, may be you are right, I guess this is a serious problem. I am just afraid that taking it to the service will cost much more then the macbook is worth, and I guess that Apple does not care that it happend when I made the upgrade to mountain lion, at leased I could claim the money back for the mountain lion purchase
Thanks a lot for you help.