GS-AX3000 Crashes When Connected Device Looses Power

[dwp]

Maybe the TV (and test switch) AC power supply ground/neutral is not properly bonded to the router's AC power supply ground/neutral (a building wiring issue?)... when testing, is all of this equipment using the same AC power outlet? If not, try powering the router and the TV from the same AC power outlet so that they have that common ground/neutral and no voltage difference/ground loop current between their chassis. Admittedly, a long shot guess but one must think outside the box when troubleshooting the unknown!

OE

Thanks. I sure would never have considered this. Interestingly, both TV and Router plug into the same UPS.

 

[tgl]

Try powering the router and the TV from the same AC power outlet so that they have that common ground/neutral and no voltage difference/ground loop current between their chassis.

Oh, that's a good thought! I learned years ago (and very expensively) not to run ethernet cables between devices on different power circuits, at least not without surge protectors somewhere along the line. That was a case of "nearby lightning strike fried a motherboard", which is not exactly your issue, but maybe an isolator would help if you can't easily relocate things onto the same circuit.

 

[OzarkEdge]

Oh, that's a good thought! I learned years ago (and very expensively) not to run ethernet cables between devices on different power circuits,

Yes, I think you need to bond the separate power panel Earth grounds together through a proper ground wire, not through equipment interconnects like the Ethernet 0vdc. Or use a wireless bridge.

OE

 

[dwp]

It is finally possible I may be on to something with this. Due to the power discussion above, I finally started to assess things.

The Chromecast that was involved with this was deriving its power (as too way the USB ethernet adapter used for connectivity) from the USB port on the side of the TV itself. At least initially, this appeared to cause no problems with the Chromecast or ethernet adapter - in other words, they appeared to work just fine. So I presumed that they were getting enough power to do their jobs. And having the power switched off when the TV is turned off - that seems to be what happens - seemed reasonable as otherwise, the Chromecast and ethernet adapter would just be vampire devices.

But given the discussion and ease of testing, I finally decided to remove the Chromecast and ethernet adapter from the TV's USB port and now I am powering it with a small cell-phone charger plugged into (for now) a nearby APC UPS. So the two devices are now powered all the time and that kind of sucks. But on the other hand, since doing this (several weeks) I have not had another crash.

Since turning the TV off killed power to the USB port and then the 2 devices, perhaps this lead to some kind of unanticipated networking condition in the router's firmware causing the crash. I personally do not see/understand what that might be since power outages happen around here all the time. The router is plugged into the APC UPS so it generally keeps running at power outages. But in general, the TV is off when they occur.

Anyhow, I just hope this lasts. Thanks!