ratmice Posted December 4, 2021 Share Posted December 4, 2021 I recently ran into a problem whereby my server would not power up. I am planning to renovate the server now. I purchased a little power supply tester box. When plugging in the MB connector everything checks out except the -5V LED does not light up. All other connectors test out fine. I went online to see what this could mean and noticed that more expensive, and presumably better testers, do not even report the -5V signal. My question is: what does this even mean, and is this reason to get another PS? If I had a different tester, I might not even know about the -5V "problem". Quote Link to comment
ratmice Posted December 4, 2021 Author Share Posted December 4, 2021 Don't really have a spare 'puter around to test on, but I can bring it to a friend's house. I did a bit of sleuthing and it seems that the -5V rail is deprecated in the ATX specs, as seen in the last paragraph of this document (http://www.playtool.com/pages/psurailhistory/rails.html). I am not sure if this PS is that did not have that voltage available when new. Quote Link to comment
Vr2Io Posted December 5, 2021 Share Posted December 5, 2021 9 hours ago, ratmice said: I am not sure if this PS is that did not have that voltage available when new. There are a label on PSU will show what voltage spec is. -5v no use over 10years. 1 Quote Link to comment
ratmice Posted December 5, 2021 Author Share Posted December 5, 2021 8 hours ago, Vr2Io said: There are a label on PSU will show what voltage spec is. -5v no use over 10years. Thanks. This PSU is about 10 yrs old, but it appears that it is, indeed, missing a -5V rail. Good news! Quote Link to comment
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