Having some issues with Mac Pro I’m hoping you can help with. I received a Mac Pro 2009 4,1 from my work place after a user noted it ‘it just died’
Our guys here looked at it and could only conclude the fault could be hardware related but they were unsure what exactly.
I took it home and installed a hard drive I had to hand with Windows 7 pre-installed, powered in on and after about a minute it loaded Windows normally despite not hearing the Mac start up tone.
While browsing around in Windows I noticed the keyboard and mouse would go unresponsive intermittently. This was temporarily resolved by restarting Mac. This gave me some hope so I installed El Capitan on an external drive using a friends Mac, installed it in my Mac. It fails to boot.
Blank screen on power up
No start up tone is audible on boot up
The power led appears and is solid.
All fans spin up
The hard drive spins up despite not booting
The red led on the processor tray flashes briefly on power up – as it should
Keyboard num lock led doesn’t light up
What I’ve done so far:
Reset the PRAM battery
Replaced the PRAM battery
Swapped hard drive into every available bay
Swapped graphics card into another available expansion slot
Successfully booted to Windows from HDD
Tried booting from Ultimate Boot CD to run diagnostics. Fails. Probably has something to do with it being an ISO file?
Attempted firmware restoration here: https://support.apple.com/kb/dl976?locale=en_GB This fails due to the power button remaining solid when held in
So at this point I’m fairly certain (unless I’m missing something) the fault is hardware related. Whether it’s the backplane or the motherboard tray that needs replacing I’m not sure but I thought I’d run it by the community for any suggestions before sinking money into either, or both. Any help is appreciated.