Check memory installation instructions for proper installation order. Troubleshooting: Try reseating the memory DIMMs. An LED will light up on the memory riser card corresponding to the affected DIMM.

An LED will light up on the memory riser card next to the affected DIMM or empty DIMM slot.ģ Flashes: A RAM bank failed extended memory testing. If the test detects a problem, the status LED located above the power button on the front of the computer will flash in the following ways*:ġ Flash: No RAM is installed or detected. Power-On Self Test: RAM and Processor VerificationĪ power-on self test in the computer’s ROM automatically runs whenever the computer is started up after being fully shut down (the test does not run if the computer is only restarted). Unplugged everything and restarted.still nothing.Īndrew Taylor, here are a couple things that may help to further trouble shoot:' Then ran OS X installer and installed Yosemite on the newly-formatted HD in the MP. I immediately got the 'The disk you inserted is not readable.' dialog on the MBP and used Disk Utility to format it. Today, I connected my MBP to one of the machines via Firewire and started the Pro in Target Disk Mode. Is it because there's no drivers on the brand-new hard drive?įor what it's worth, I opened up the case and started each machine, and I see no LED indicator lights anywhere inside (I think there are supposed to be some, but I don't know where). I don't understand why I'm not getting any video (and no video is making it hard to troubleshoot anything else). But I get no video from either machine (I have two monitors plugged into each - one via HDMI and one via VGA). I bought a couple of new hard drives and a couple of new (MSI F5450 MDIGH) video cards, installed one of each into each of the two Xeon machines, and pressed the button.īoth machines turn on and the power lights are on steady. None of the machines had hard drives or video cards. The Xeon machines are the ones I'm trying to resurrect.

Of the three I picked up, one turned out to be a dual-processor G5 machine, and the other two are dual-processor Xeon machines. I recently came across what seemed like a good deal on a handful of 2008-era Mac Pro desktop machines.

Mac pro 2007 power on no image