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Forum Discussion
ReadyNAS Pro Won't Power Up After Sitting Idle For Long Period - Power Supply Good
I have ReadyNAS Pro model RNDP6350-100NAS. After sitting idle for some months I tried to power it up. Nothing, power supply fan didn't even run. I then took all of the disks out of the NAS. I ...
JosephAE wrote:
Then connected the green wire in the harness to ground. This enabled the power supply. Power supply fan ran and all voltages at the other connectors measured correctly.
Hopefully Sandshark will comment. But I think the PSU has failed (and that your test didn't show that because you weren't testing the supply under load).
Thanks, I'll look into that.
Without doing any harm. With the disks out and the 24-pin connector attached to the motherboard. Can I connect pins 4 & 5 (green & black wires) to manually start up the power supply and then measure the voltages?
JosephAE wrote:Thanks, I'll look into that.
Without doing any harm. With the disks out and the 24-pin connector attached to the motherboard. Can I connect pins 4 & 5 (green & black wires) to manually start up the power supply and then measure the voltages?
You can, but the drives are a big part of the load, so it won't be comprehensive. But it's better than completely unloaded.
Did you try powering it on with the button with the drives removed?
When the NAS was "idle", was it plugged in and the rear switch on? If so, was it in a potentially hot environment?
I suspect your problem is with the power-on circuit, especially if you did have it plugged in during the idle time and more especially if it could have gotten warm. One big part of that power-on circuit is the +5VSB (5 volt standby) power which is on whenever the unit is plugged in and the switch is on. So those circuits remain powered and are susceptible to wear and damage even when the NAS is "off". That's the most common power supply failure in a ReadyNAS.
If you can't turn it on with the button and you can by grounding the green wire, then the power-on circuit is almost certainly where the problem lies. If it has no Ethernet activity light when powered that way, then the +5VSB of the supply is the likely issue (the Ethernet circuit is also powered by it so WoL works).
Do you have a "spare" ATX supply? You can plug it in externally and see if that fixes it before you invest in a replacement supply.
Sandshark thanks for the help. Let me try to answer your questions.
Q: Did you try powering it on with the button with the drives removed?
A: Yes I did. NAS would not power on using the front panel button.
Q: When the NAS was "idle", was it plugged in and the rear switch on? If so, was it in a potentially hot environment?
A: It was plugged in and for some of that time the power switch was on. In was stored in a cool environment.
Q: One big part of that power-on circuit is the +5VSB (5 volt standby) power which is on whenever the unit is plugged in and the switch is on.…..
A: With the NAS power switch on. The voltage at the +5VSB pin at the 24 pin connector was correct. (Assuming SB is short for Stand-By.)
Q: If you can't turn it on with the button and you can by grounding the green wire, then the power-on circuit is almost certainly where the problem lies……
A: With the power switch on then grounding the green wire to ground (Pin 16 to Pin 17) on the 24 pin connector the NAS turned on and the front panel displayed “ReadyNAS” but did not change after. All fans were operational and all voltages at the 24 pin connector were correct.
I put the disks back into the NAS and tried to start the NAS using the previous procedure. Same results, the disks didn’t spin up and “ReadyNAS” showed up on the front display.
Side note: I found a spare ATX power supply.
Thanks for the help.
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