Chosen Solution
Mac Pro A1289, Power light goes on, it chimes, screen stays black. Apple Studio monitor connected through DVI to ADC adapter A1006 - suspicious, will be checked soon. All fans inside don’t work, seems like nothing inside the tower generates any heat. Can’t decide whether to abandon this one and buy a newer one (very limited funds, close to none), or try to check power supply - how do I find out if it is bad? What else to check? All set up worked with no problems for about 5 years. Any ideas?
I know the PSUs in that model are proprietary and I am not 100% sure about how the cabling is set up, but you might have luck with one of these. It is handy to have around if you have a friend or relative who has a desktop PC as well. Any time I get a new PSU I ALWAYS hook it up and check it. I have had a couple of bad PSUs out of the box and it is good to know before you put it inside and potentially damage something else. If that doesn’t have the right ports for your PSU then a regular old multimeter is the way to go. Power off the machine, unhook all the power cables then power the PSU back on and check each pin. I you should be able to find a voltage reference pinout here. Good luck man!
