• Welcome to the new Mac-Forums. See News and Community Announcements for more details.

Mac Pro 4,1 Problem!!!!

Joined
Aug 28, 2017
Messages
295
Reaction score
4
Points
18
Location
Wales, UK
Your Mac's Specs
iMac 27" 32GB i7 2TB OSX 10.15.5 late 2013
hi guys I have the above Mac Pro with a single CPU

I upgraded it to a dual tray board but for some reason it won't boot it at all

I get normal fan speed and that's it no chime no video no nothing power light is solid

I have removed both heatsinks and inspected the CPU's And Sockets and all looks good.


now to trouble shoot I tried just CPU A in the board and the Mac Pro fired up and chimed booted see's the CPU tray serial and SMC version.

so I thought great placed back in CPU B and no chime again,

just normal fan spin and power light solid


any advice guys ?

my only other question is could it be that the CPU board wasn't upgraded to a 5,1 firmware ?

despite it working with a single CPU in socket a ?


any help is appreciated thanks
 
Joined
Aug 28, 2017
Messages
295
Reaction score
4
Points
18
Location
Wales, UK
Your Mac's Specs
iMac 27" 32GB i7 2TB OSX 10.15.5 late 2013
hi harryb2448


I have both e5520's in there at the moment as it won't boot with a X5650 single or dual cpu's

my current CPU board has a 6 core CPU in there 12 threads and is running firmware 5.1

thanks
 
Joined
Aug 28, 2017
Messages
295
Reaction score
4
Points
18
Location
Wales, UK
Your Mac's Specs
iMac 27" 32GB i7 2TB OSX 10.15.5 late 2013
I have tried to bring the CPU tray to the current version ie 5,1 but the about this Mac still says its a 5,1

so any other ideas ?
 
Top