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Forum Discussion
rowanmf
Nov 15, 2025Follower
ReadyNAS RND-6A not booting ?
i have just been given an old 6 bay NAS , sticker on the bottom shows as per below. no drives were in the cases / caddies , i have 2 old 500gb drives i have installed to see if i can get to t...
Rottenweiler
Nov 25, 2025Guide
Agreed. Failing PSU most likely. Double check all cabling internally, but failure MOST common. There are replacements available occasionally on eBay. It is somewhat tedious to tear down and replace the PSU itself, but doable. Caution when taking apart... You WILL rip off the surface mounted capacitors on the backplane board if not careful when trying to maneuver and fish wiring out. You will also likely need a pair of pliers to grab and wiggle the three white colored Molex connectors free. (They always FEEL like they are welded in to the plastic sockets).
As an aside, the PSU will often have bulged/failed capacitors as the source of failure, (about 2 out of 3 in my experience) the caps CAN be replaced/resoldered with new but it involves high voltage and some danger and it is VERY tedious and annoying to try and repair. (From experience, I would suggest just buying a replacement (when/where available).
StephenB
Nov 25, 2025Guru - Experienced User
Rottenweiler wrote:There are replacements available occasionally on eBay
There are also some stock PSUs that can be used, but there is a small change you need to make to the connector. Sandshark can help sort out if a particular option is suitable.
Rottenweiler wrote:You WILL rip off the surface mounted capacitors on the backplane board
Yeah, you do need to be very careful - particularly with the components on the bottom of the system board nearest the supply.
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