martinlangley Posted March 14, 2019 Share Posted March 14, 2019 Hi I have an ageing Mac Pro A1289 (5.1). When stripped down to the motherboard and (bare) processor card the diagnostics are fine. When the processor card is populated with a single processor, the front panel light flashes and the machine fails. How do I find the cause of the issue? If this is due to a matched pair of processors not being fitted, how does the system know this on the basis of only one processor? Link to comment https://www.insanelymac.com/forum/topic/337941-mac-pro-resurrection/ Share on other sites More sharing options...
LouCioccio Posted July 21, 2020 Share Posted July 21, 2020 Go here http://tim.id.au/laptops/apple/macpro/macpro_mid2010.pdf Troubleshooting chart is there Lou Cioccio Link to comment https://www.insanelymac.com/forum/topic/337941-mac-pro-resurrection/#findComment-2731179 Share on other sites More sharing options...
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