G'day! wlan going away like that *could* be wireless hardware failure, but from what I've seen myself, it is just as likely to be one of two other possibilities: 1. power supply failing - when psu struggles to deliver sufficient /power/ (i.e current draw drops voltage more than usual) then peripheral interfaces tend to shut down before the router itself crash/reboots. Since 5GHz wireless would be the greatest power consumption, it makes sense that it would fail first. 2. bad blocks developing in nvram - as you probably know, flash ram has limited number of writes per block before it eventually fails to store new data reliably. RouterOS doesn’t reliably detect when storage memory fails, so first indication is weird behavior - like config changes not 'sticking', random reboots, or, yes, interfaces going away ; ) In the latter case, netinstall process includes low level re-format of nvram which detects and marks bad blocks thus can often cure the related problems. (this is why our support team will /always/ recommend netinstall process before returning goods for RMA ;) Since the triple chain version of wAP have not been around for a long time, I suspect there is a fair chance that you'll be able to get a few more years service out of it by one of the above fixes : ) 🤞 Cheers! Mike. -----Original Message----- From: Public <public-bounces@talk.mikrotik.com.au> On Behalf Of Damien Gardner Jnr via Public Sent: Thursday, 21 December 2023 7:38 AM To: MikroTik Australia Public List <public@talk.mikrotik.com.au> Cc: Damien Gardner Jnr <rendrag@rendrag.net> Subject: [MT-AU Public] RBwAPG-5HacT2HnD losing 5GHz radio? HI all, Kinda pulling my hair out with this one.. Hoping someone has a suggestion. I have a RBwAPG-5HacT2HnD, love this thing. But yesterday morning we started getting weird outage alerts from monitoring at home, with some devices being offline. (The main kicker was the cubby lol) When I got home from work I went looking, and finally tracked it down to wlan2 being missing.. A reboot brought it back.. But 10 mins later it was gone again. Rebooted it a few more times, then added remote syslog, and went to bed. Got up this morning, and remote syslog really wasn't any use at all (I assume there's some specific prefix I should have been punting to remote syslog to catch the device going away), and now reboots aren't helping, it has to be a physical power removal and re-application.. Thankfully I have a spare (Got one on ebay at the start of the year, and had meant to set it up at the back of the house), so have just finished copying the config to it, but would love to get this one working properly again.. Was hoping it was just mini-PCIe cards or something, but alas no. Has anyone had the 5GHz radio go away on these? And fixed it? It's 4 1/2 years old, so I'm pretty sure it's out of warranty period 🤣 Thanks, DG -- Damien Gardner Jnr VK2TDG. Dip EE. GradIEAust rendrag@rendrag.net - http://www.rendrag.net/ -- We rode on the winds of the rising storm, We ran to the sounds of thunder. We danced among the lightning bolts, and tore the world asunder _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au

We had a bad batch of them right at the end of their availability but they failed very early and completely. We have had a few hAP ac lite’s (RB952Ui-5ac2nD-TC) loose their wlan2 interfaces over the years. Sometimes they would come back after a reboot or a power outage sometimes it was permanent. I never thought to replace the power supplies but then again where we took them out of service I don’t recall any of them ever getting "better”. I do have a couple that have required a Netinstall because they ended up with completely corrupted RouterOS and they were getting PoE from Mikrotik CRS3xx switches so power shouldn’t be an issue. Both of those are now in the “untrusted” drawer. At 4 1/2 years old it sounds a lot like a electrolytic capacitor on the power supply circuit… Good luck.

On 21 Dec 2023, at 6:38 am, Damien Gardner Jnr via Public <public@talk.mikrotik.com.au> wrote:

HI all,

Kinda pulling my hair out with this one.. Hoping someone has a suggestion. I have a RBwAPG-5HacT2HnD, love this thing. But yesterday morning we started getting weird outage alerts from monitoring at home, with some devices being offline. (The main kicker was the cubby lol) When I got home from work I went looking, and finally tracked it down to wlan2 being missing.. A reboot brought it back.. But 10 mins later it was gone again. Rebooted it a few more times, then added remote syslog, and went to bed. Got up this morning, and remote syslog really wasn't any use at all (I assume there's some specific prefix I should have been punting to remote syslog to catch the device going away), and now reboots aren't helping, it has to be a physical power removal and re-application..

Thankfully I have a spare (Got one on ebay at the start of the year, and had meant to set it up at the back of the house), so have just finished copying the config to it, but would love to get this one working properly again.. Was hoping it was just mini-PCIe cards or something, but alas no.

Has anyone had the 5GHz radio go away on these? And fixed it? It's 4 1/2 years old, so I'm pretty sure it's out of warranty period 🤣

Thanks,

DG

--

Damien Gardner Jnr VK2TDG. Dip EE. GradIEAust rendrag@rendrag.net - http://www.rendrag.net/ -- We rode on the winds of the rising storm, We ran to the sounds of thunder. We danced among the lightning bolts, and tore the world asunder _______________________________________________ Public mailing list Public@talk.mikrotik.com.au http://talk.mikrotik.com.au/mailman/listinfo/public_talk.mikrotik.com.au