Is it bad that I'm glad it was a JUST a power supply? Our T3500s hard drives have a tendency to ually after an update in which we've forced them to reboot. We usually see this in our T3400s, but this one was a T3500. I just replaced another power supply this morning. The GREEN LIGHT should stay on as long as the test button is pushed with nothing plugged into the harness connection side. 2 T3500s = 7 Power Supplys total in 4 years!!! ABSOLUTELY REDICULOUS!!! THESE POWER SUPPLYS FOR THE T3500s HAVE TO BE DEFECTIVE!! For a test, unplug the main wire harness from the power supply, keep a/c plugged in, and push the TEST Button on back of the power supply. This new power supply from DELL is now on the way for a return replacement. I then swapped the new refurb power supply out with another one in the office and the system works fine. I put the new refurbished power supply in and it lasted 40 seconds upon boot then the new one died also. looked at memory, but memory swap outs did not work. The second one, codes 1 & 3 were flashing. The first one, the power supply had to be replaced 3 times in four years (can't remember the codes). I had this happen to the only (2) T3500s that I have in the office. The motherboard never did POST even with all new parts and expansion cards. As for the motherboard, just a new Dell motherboard with everything including thermal paste. Note: the original bad stick of memory was a hynix brand and they replaced it with Samsung I think. The motherboard, however, takes a few more steps. If it's just memory, usually the T3500 will display memory error in bank 1, 2, 3, or 4 like ours did. Then I went on to replace cpu and psu from another T3500 with no luck. I'd place it in slot 1, power on, no good, power off, slot 2 etc. What I did to diagnose the motherboard was pull out all of the expansion cards and place a good stick of memory from another T3500 in each ram slot. The other had a bad stick of memory in it. One, out of the box (mine) had a bad mainboard and I done all of the diagnosing myself before contacting Dell. We ~35 Dell T3500s that we ordered at one time earlier this year. Neither machine would POST at all, regardless of the amount of RAM installed.Īnyone else seen this with the T3500s? Is there something else I should be doing? Both machines also gave no BIOS error beep if I tried to get them to POST with no RAM in them at all. I've had 2 Precision T3500s go belly up in 2 days, both flashing 1-3 error lights (which means a memory error according to Dell's website).

Dell precision t3400 change motherboard