06-06-2016 09:03 AM
06-06-2016 09:07 AM
Can you hear the crowd chanting... "Shoot it! Shoot it! Shoot it!"
Can you hear the crowd chanting... "Will it blend? Will it blend?
Sooo... my liquid nitrogen dewar showed up Saturday... things are about to get cool over at my YouTube channel with different types of equipment http://www.youtube.com/williehowe
First thing we're going to do is totally freeze an old wrt54g and watch it shatter.. For science and the progression of wireless technology..
06-07-2016 09:49 AM
Sooo... my liquid nitrogen dewar showed up Saturday.
Mine showed up last Christmas morning.
09-15-2016 11:57 AM
For what it's worth, I walked into work this morning to find my US-24-500W also stone cold dead. The exact same resistor is fried. This was connected on a UPS. I'm 15 months in, and UBNT says "sorry," even though I'm willing to pay for a new power supply. No burn marks but the resistor definitely ate it. Guess if I try my hand at soldering I can't make it any worse!
09-15-2016 12:35 PM
09-15-2016 12:36 PM
I wasn't there to hear the boom, from the logs of other services it looks like things hit the fan around 5 in the morning. Upon opening the case, it's the resistor at hole C24 on the power supply that failed. I ordered some from Digi-Key ($5) and will take a stab at it at some point, I guess if I get it working it can be a backup switch.
09-15-2016 12:44 PM
@UBNT-Brandon mentioned in the other thread "We had some issues with the very first release version (which do not have a console port) so we're extending replacement terms for anyone who has issues with these.". Terms were extended in my case.
It would be nice if we could order parts, though, as I have another US-24-250W that needs a new power supply that I'd almost prefer swapping out the part to going through the RMA process. *shrug*
09-15-2016 12:49 PM
Yeah, the power supply is easy to get to and clearly made by a third-party, could just drop in a replacement.
Thanks all for chiming in! What a great community. I'll see if I get a response from UBNT before I try fixing it myself.
09-15-2016 01:06 PM
I emailed sales at Gospower(.com) requesting to purchase one “Gospower G0684-50013240A” but never received a reply. :/ I even gave them a description of their part - "It is an AC to DC power supply that provides 26.5VDC @ 18.9A, 53VDC @ 9.5A and 24VDC @ 2A" hoping they'd offer a similar (non-OEM) model as they don't really have that specific configuration listed on their site.
Worked out great in the end, though, thanks to UBNT extending their coverage.
09-15-2016 02:59 PM
We'll be reaching out soon.
10-28-2016 12:40 PM
Just in case anyone else experiences these power supply failures and are out of warranty - As long as you can provide 24v to the main board and daughter boards the switch will boot and provide 24v POE. Obviously it would be better if UBNT would offer a replacement power supply, but this is better than scrapping the unit entirely.
05-10-2017 03:09 AM
We've just had something similar happen to a US-8-150W (13 months in; PSU not supplying DC voltage). This one is has a GO398-15011480A but I've not stripped it down to look for component damage (yet). Anyone else seen this? Still no luck sourcing a replacement PSU? I agree with the rest that this is a shame as it would be a simple swap.
06-22-2017 09:39 AM
I just had the same thing happen to me as well (US-24-250W, 16 months in). I opened the case and see no obvious damage, but there are no LEDs lit or fans spinning so I believe it's the PSU.
When contacting support they basically told me I was out of warranty (true), but to try and replace the PSU. I'm not sure with what though since the components don't seem to be generally available...
06-22-2017 10:01 AM
When I took the power supply apart, resistor R5 was fried. They were on a UPS but I changed UPS's since then in hopes that it might handle it better. Some random employee on the forums forced the RMA through. It took like 2 months but a new one eventually showed up. I keep it as a backup since now I know the power supply could fail unexpectedly. Short of that, I guess I would pick up a 24V power supply from Digikey and try to make it work. AFAIK Ubiquiti doesn't make the power supplies independently available and I couldn't find anything about the Chinese company that makes them online.