If the computer boots after you press the system reset switch, try shutting off Follow these steps to reset the system:Ģ With a nylon probe tool, press the system reset switch located in the upper If a computer that won’t consistently boot from a cold start has power supply Restart the system while it is powered up. Mac Pro has a system reset switch on the logic board that you may use to Then reconnect the keyboard and mouse to theĥ Press the power button to start up the computer Responding, hold the power button until it turns off).Ģ Unplug all cables from the computer, including the power cord and anyĤ Plug the power cord back in, making sure you are not pressing the powerīutton at the same time. I dont want to take it into the shop and pay the $70 odd dollars to just have it diagnosed if it is such a simple asnwer so can anyone please please help me!!!!ġ From the Apple menu, choose Shut Down (or if the computer is not could it also be the tiny flat battery on teh logic board prehaps short circuting the system? If it is the power supply is there just a fuse blown that i can replace? Also if i put my ear right u against the power supply when its plugged in i can hear a very very faint ticking sound, similar to perhaps the sounds ignition sparks make on a gas stove. With everything that i have read i think it has something to do with the power supply. took out the optical drive to find incredible amounts of dust so once again blew all that out and blew air through the power supply and sent dust all over the room. removed the graphics card and tried again. I tried to reset the SMC and the button above it on the logic board with no result. When i press the power button not a single light on the logic board comes on, no fans starting up or electronic noise. running smoothly all day and left it running overnight. Blew out all the dust from fans and power supply with a blower. I replaced the ram using the specific fully buffered ram, in a pair etc. This entry was posted in Essay, Mac and tagged Hardware, Mac, Mac Pro 2008, Power supply on 8 June 2014 by Link.For the past 4 months my Mac Pro 1,1 quad 2.66 has been crashing. I hope this is of use if you run into Mac Pro 2008 issues. The new comparable Mac Pro is the best part of $5,000 USD, and wouldn’t be noticeably faster for 90% of what I use it for, since I already upgraded with a fast SSD (highly recommended by the way). However the probability of working out the appropriate adjustment without a service manual was pretty small.Īnyway – I hope I can get a few more years service out of the box, thanks to the reduction in year-on-year improvement to single-threaded CPU performance 2008 X5482 Xeon’s have 60% of the performance of a brand new Xeon E3-1270. One interesting thing is large number of adjustment pots, which suggest that it may have just drifted out of alignment over time. On investigating the faulty power supply I found nothing special or obviously wrong with it no bulging capacitors, burned out chips or transistors. Once done my Mac was online immediately – overall took about two hours. Unplug the flat power cables that link the case with the PSU.
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