Are you saying by pushing the BIST button at back of old psu and front power button, you are able to get Dell logo on monitor and enter bios to do hardware diagnosis? If yes it sounds like psu and memory are both working. Two flashing Amber is supposed to suggest memory not detected when pc fails to post, but it sounds like your pc was able to post before.
Since your pc fails to post now after psu replacement, try remove all memory chips and install only one back in DIMM#1 and test again, in case you somehow unseated memory during psu exchange. You did say power button did not light up w old psu, but light up now w new psu and flashes 2 Amber now, correct? If yes, that is a change saying the old psu is not normal.
@RoHe Got a dead XPS 8920 from a friend. Computer wouldn't start or if it did it would crash. Got flashing start button led that indicated motherboard failure. After playing with it for many hours found out pretty much by accident that the power switch was bad. I could poke the terminals of the switch with a screw driver and get the machine to turn on, even if only for a second. After switch replacement the computer has been flawless. So much for a faulty motherboard.
redxps630
9 Legend
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15.4K Posts
0
January 7th, 2022 14:00
Are you saying by pushing the BIST button at back of old psu and front power button, you are able to get Dell logo on monitor and enter bios to do hardware diagnosis? If yes it sounds like psu and memory are both working. Two flashing Amber is supposed to suggest memory not detected when pc fails to post, but it sounds like your pc was able to post before.
Since your pc fails to post now after psu replacement, try remove all memory chips and install only one back in DIMM#1 and test again, in case you somehow unseated memory during psu exchange. You did say power button did not light up w old psu, but light up now w new psu and flashes 2 Amber now, correct? If yes, that is a change saying the old psu is not normal.
RoHe
10 Elder
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45.2K Posts
0
January 7th, 2022 17:00
Blink codes on XPS 8920 should come in two groups. Are you seeing 2 blinks <short pause> 2 blinks<longer pause> repeat?
2,2 = Motherboard: BIOS ROM Failure
In that case, I'd start by clearing BIOS and replacing the motherboard battery with a fresh one:
Does that help?
nikoolpatel
1 Rookie
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2 Posts
0
January 7th, 2022 23:00
That’s about right, where the new psu will flash amber 2 times but the old psu will not let me just press the power button to boot up
Fwankie
1 Message
0
September 5th, 2023 12:01
@RoHe Got a dead XPS 8920 from a friend. Computer wouldn't start or if it did it would crash. Got flashing start button led that indicated motherboard failure. After playing with it for many hours found out pretty much by accident that the power switch was bad. I could poke the terminals of the switch with a screw driver and get the machine to turn on, even if only for a second. After switch replacement the computer has been flawless. So much for a faulty motherboard.