Mac Pro 5.1, no chime, DS1510 lit. Replaced CPU tray, no difference.

[Mrdevans]

I had an Apple shop look this over, they tried a single processor board, that didn’t work so they suggested a new cpu, I refused it and got a used cpu tray with processor, cpu and memory and the DS1510 is still lit on that too.

Anybody seen this before?

 

[mattferg]

Backplane or BIOS chip screwed.

 

[verdejt]

Do you have the service manual for the MacPro? if not you can get it here. http://tim.id.au/laptops/apple/macpro/macpro_mid2010.pdf
I would start at step 1 and take the Mac Pro down to Minimum config as stated on page 33 of the manual and go from there.

 

[Mrdevans]

Thanks for that tip. Knocked down to minimum config and the 5v STBY led is not lit. Power supply or backplane board.
[doublepost=1546471286][/doublepost]I have a Mac Pro 1.1, is that the same power supply as the 2012 5.1?

 

[tsialex]

I have a Mac Pro 1.1, is that the same power supply as the 2012 5.1?

No.

Compatibility of power supplies:

• Mac Pro 1,1 and 2,1 = same power supply
• Mac Pro 3,1 = only model that is unique
• Mac Pro 4,1 and 5,1 = same power supply

 

[Mrdevans]

to finish off this thread, the problem was the backplane board. The 5v led lit up with the backboard stripped down to minimum config, so not power supply. I now have a spare cpu tray, don’t hope that comes in handy. The backboard was $69 on eBay, computer back up and running.

 

[verdejt]

that is good news.

 

[tsialex]

to finish off this thread, the problem was the backplane board. The 5v led lit up with the backboard stripped down to minimum config, so not power supply. I now have a spare cpu tray, don’t hope that comes in handy. The backboard was $69 on eBay, computer back up and running.

Nice to know, thx for the report.