MP 1,1-5,1 Mac Pro 5,1 single processor suddenly wont start *red light*

[changareth]

tried looking at different posts about this but got no hope. so my mac just suddenly stopped working when i boot up theres a red light on the tray and the fan just spins super loud and thats about it.

I press the diag button to check on the power supply and it seems fine, tried removing all rams putting 1 by 1 and didnt fix the issue. tried removing that battery on the back board and putting it back in and pressing the reset button didnt work.. tried removing all cards / hdd and still no hope. Is my cpu dead? I mean i replaced it not long ago either ...

 

[tsialex]

Test your complete CPU tray with another Mac Pro, test a known working CPU tray with yours - after that you will know for sure where the problem is located and what to investigate.

 

[changareth]

Test your complete CPU tray with another Mac Pro, test a known working CPU tray with yours - after that you will know for sure where the problem is located and what to investigate.

damn not sure where i can find another mac to test that hahah

 

[Macschrauber]

You can try to buy a cheap one for spares. Keep the remains or sell them.