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Forum Discussion
Failing ReadyNAS Ultra 4 Plus
I noticed one morning my NAS had powered down and couldn't turn it back on. After turning the power off to it completely and waiting a couple of minutes, it turned back on. Strangely it then turns of...
Somehow, my previous reply isn't showing up:
With that symptom, the power supply is the most likely cause, specifically the +5VSB (5 volt standby) power the powers the on/off circuit. Unfortunately, the +5VSB is not monitored by most ReadyNAS, so there would be no indication of an issue in the logs. Testing without a load, especially for an issue that takes a while to show itself (likely due to heating up) is not reliable. So I think you are on the right track.
You can buy a pre-modified supply on eBay for not much more than a standard one if you decide to replace it. If you just want to use the PC supply to power it long enough to recover the data, make sure you seal the gap where the PC power cord goes in so that the chassis fan works properly to pull air over the drives.
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