A few months out of warranty and it's dead as a fart. XPS 8950 with a 12th Gen I5, 32gb DDR5 RAM and a GTX1650 GPU.....
Symptoms it's giving are really making a coin toss between bad motherboard and bad PSU....I'm leaning toward motherboard, but there are some strange irregularities with this piece of shit system.
Basic test:
Upon connecting power cord, system powers on by itself (no button push) for a second then powers down...and then powers back on again, I hear a relay trip inside the PSU, and then powers down again and that's it. It won't do anything else. Power button is unresponsive (yes I checked to make sure it was good, it is). Only way to replicate this is to remove the power cord and reinsert it.
Troubleshooting attempt:
1) Removed CMOS battery & cleared NVRAM. Nothing changed.
2) Removing RAM & GPU (connected display to onboard displayport), symptoms do not change.
3) If I unplug the 2x +12v CPU power connectors by the processor, the unit powers up. power LED on the front blinks 2x white and then 4x amber codes and then eventually powers back down; yet continually & indefinitely blinks the codes. All this time, power button is unresponsive to anything; momentary presses or Press & hold.
4) Now here's where it gets strange. If I probe all the power connectors WITH THE SYSTEM POWERED DOWN (power connectors plugged into the board AND unplugged as well), there is what I believe to be correct voltages on all pins; +12v & 3.3v. The 12v rails read 12.26 regardless of whether connected or not. The only position that does not have power is the +12v on the PCIe GPU connector. If I trigger the PS_ON leg (blue wire on main 10-pin plug) to GND, the PSU starts (relay clicks, fans come on, and 'power_good' LED on the rear illuminates. Voltages don't change excpt the PCIe connector now has +12v present. Bizarre....
What a disgusting system this is, especially for it to be so new.... I doubt the owner will want to fix it anyway....but I'd like to figure this out....and I do believe it to be the motherboard....but input is appreciated!
Symptoms it's giving are really making a coin toss between bad motherboard and bad PSU....I'm leaning toward motherboard, but there are some strange irregularities with this piece of shit system.
Basic test:
Upon connecting power cord, system powers on by itself (no button push) for a second then powers down...and then powers back on again, I hear a relay trip inside the PSU, and then powers down again and that's it. It won't do anything else. Power button is unresponsive (yes I checked to make sure it was good, it is). Only way to replicate this is to remove the power cord and reinsert it.
Troubleshooting attempt:
1) Removed CMOS battery & cleared NVRAM. Nothing changed.
2) Removing RAM & GPU (connected display to onboard displayport), symptoms do not change.
3) If I unplug the 2x +12v CPU power connectors by the processor, the unit powers up. power LED on the front blinks 2x white and then 4x amber codes and then eventually powers back down; yet continually & indefinitely blinks the codes. All this time, power button is unresponsive to anything; momentary presses or Press & hold.
4) Now here's where it gets strange. If I probe all the power connectors WITH THE SYSTEM POWERED DOWN (power connectors plugged into the board AND unplugged as well), there is what I believe to be correct voltages on all pins; +12v & 3.3v. The 12v rails read 12.26 regardless of whether connected or not. The only position that does not have power is the +12v on the PCIe GPU connector. If I trigger the PS_ON leg (blue wire on main 10-pin plug) to GND, the PSU starts (relay clicks, fans come on, and 'power_good' LED on the rear illuminates. Voltages don't change excpt the PCIe connector now has +12v present. Bizarre....
What a disgusting system this is, especially for it to be so new.... I doubt the owner will want to fix it anyway....but I'd like to figure this out....and I do believe it to be the motherboard....but input is appreciated!
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