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Netgear ReadyNas RND4000 power supply issues SOLVED
My NAS in subject line died a week ago just as I was getting ready to transfer to a new NAS. I was petrified of losing decades of family content on this JBOD array. Researching here, I find that probably it could be simply the PSU not powering up. The symptoms matched the diagnosis, so I thought why not go out and find a new PSU. Bought one on eBay and then found the ATX pinout here on this forum, and cancelled the eBay PSU and did the following.
1. took apart ReadyNas, yes, confirmed it has an ATX style connector
2. took off the Netgear PSU (note all the machine screws are easy to determine on how to assemble, EXCEPT ONE that is hidden by a label that says Do Not Remove (lol), but you do have to remove it.
3. Instead of trying to find another Netgear PSU, you can now use a cheapie PC ATX power supply.
4. Bought a $25 PSU from Amazon overnight
5. Buy a Molex Pin Removal tool, $5 on Amazon.
6. Take the 24 pin connector from the PC PSU, and slide away the 4 pin accessory piece, so that only the main 20pin remains
7. Now, that 20 pin PC PSU is almost ready, except there are two pins that the Netgear board needs to see changed.
7.1. ATX pin connector #12 for PC is usually -12V, and it needs to be +12V
7.2 ATX pin connector #18 for PC might be empty, and it needs to be also +12V
8. Get your Molex pin tool, and find and remove two +12V pins from other connectors and insert into #12 and #18 on the 20 pin connector.
9. Turn on the PC PSU (short pins 12 and 14) and verify all the voltages are correct, refer to RND4000 ATX required pinout found elsewhere on this forum. If you make a single mistake here, you could blow up your NAS, so your verification must be perfect.
10. Now plug the modified 20 pin ATX PC PSU into your NAS, and it will power up.
This is not a pretty solution, because you can't close up the RND4000 case and have it look normal, but I don't care, I am going to trash the whole thing once its data is offloaded.
1 Reply
You can also buy a 24 pin to "20+4" extension and do the mod on that instead of the supply itself if the supply you bought has a 24-pin connection (so is officially an ATX12V supply). The +4 part has the two more +12V lines you need. This is a good way to do it if you are "borrowing" a supply from a computer just to see if the supply is the problem.
When you are powering the NAS externally, you do need to make sure the fan is doing it's job by covering over the old power supply power opening and sealing any gap where you ran the cable. For short-term, masking tape works fine. For longer term, I recommend aluminum duct ape.
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