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August 30th, 2025 02:18
Dell Precision 5820 Tower PC Not Powering On
I recently got three used Dell Precision 5820 Tower PCs. I did a Windows 10 installed, driver and software installation on one and shut it down for the night only to discover it would not come up the next morning.
The green light does not show on the PSU as it should when it is connected to power (I have used the PSU on the others and it works), pressing the power button does nothing, there is no blinking light or any light at all.
I have removed the RAM, GPU and reinserted them, I have changed the CMOS battery, still nothing.
Please, I could use some help
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PapaPee
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August 30th, 2025 11:44
Don't mean to insult you but sometimes you need to ask the obvious question - have you tried a different power cord?
imKing
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August 30th, 2025 12:17
@PapaPee Thank you for your response. Yes, I've changed the power cord.... I've used a power cord that worked on another copy, still no power.
If I pressed the black button on the PSU, it lights and fan spins but it goes off as soon as I take my finger off
PapaPee
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August 30th, 2025 12:28
...and, if you use one of the PSUs from one of the other 5820s...?
I recall that a faulty intrusion detection switch can prevent power on - can you test the intrusion detection switch with a multimeter? Or, as it's a NO (normally open) switch, bride the connections
(edited)
imKing
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September 8th, 2025 18:48
@PapaPee I did as you suggested. I also used the the switch on the other copies it is working. Maybe the problem is with the motherboard