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Forum Discussion
Overheating of ReadyNas RN104 power adapter
Hi, I have been using ReadyNAS 104 for more than 4 years now. Of late, the power adapter gets over hot and the unit shuts down automatically. If switched on after a while, it works perfectly, but...
rajamani_v wrote:
It has been more than 4 years, so am assuming it will not be under warranty.
Yes, it is out of warranty
rajamani_v wrote:
6.10.1 is the firmware in the system
Thx. There was an issue with the NIC in the NAS overheating and shutting down. But Netgear made a driver change, so 6.10.1 shouldn't have that problem. Plus no one reported an overheated power adapter.
rajamani_v wrote:
Checked the harddisks, none of them were hot, they were lukewarm, nothing noteworthy.
The disk temps look ok to me too.
rajamani_v wrote:
Had a thermal shutdown after having the NAS working for close to an hour.
The NAS log says that it is doing a thermal shutdown? Or did it abruptly shut down, or give some other reason?
The NAS can't monitor the adapter temp. So if the adapter is at fault, then I'd either expect the NAS to shut down abruptly (with no indication of why) or perhaps shut down due to an out-of-spec voltage threshold. Either way, I'd just replace the power adapter.
But if there is a thermal shutdown in the NAS, then that suggests the NAS is drawing too much power from the adapter. That seems unlikely given the temps image you posted, but worth double-checking. Though it might be still possible that the issue is the adapter itself.
Perhaps Sandshark has some thoughts.
Assuming for a minute that it really was a thermal shut-down of the NAS, it would be hard to dignose which is the symptom and which the cause for a power supply overheating. An overstressed DC=DC converter in the NAS or a partially shorted capacitor could draw too much power or an overstressed external power brick could be delivering insufficient voltage to allow the DC-DC converter to work efficiently.
It's critical to know if it really was an overheat shut-down or perhaps a voltage out of tollerance. But even with that information, it's going to be hard to diagnose without measuring the voltage and current the brick is supplying, and possibly the internal voltages. Just swapping out the brick could be a better step, since few have the equipment for the other. I've seen compatible supplies listed on eBay (12V, 7.5A, 4-pin DIN connector).
Sandshark wrote:Assuming for a minute that it really was a thermal shut-down of the NAS, it would be hard to dignose which is the symptom and which the cause for a power supply overheating. An overstressed DC=DC converter in the NAS or a partially shorted capacitor could draw too much power or an overstressed external power brick could be delivering insufficient voltage to allow the DC-DC converter to work efficiently.
It's critical to know if it really was an overheat shut-down or perhaps a voltage out of tollerance. But even with that information, it's going to be hard to diagnose without measuring the voltage and current the brick is supplying, and possibly the internal voltages. Just swapping out the brick could be a better step, since few have the equipment for the other. I've seen compatible supplies listed on eBay (12V, 7.5A, 4-pin DIN connector).
Most of it went over my head :) But understood that external power brick could be delivering insufficient voltage. Will try compatible brick and let you guys know. Anything in particular that you recommend.
Cheers!
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