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Hardware, Cabling, Installations / Re: Failure to Boot using 12vdc Power - Possible Cause and Solution
« Last post by N3AE on 2024-05-12, 23:17:16 »Well, not so fast. After several days of behaving normally, this control RRC is back to its old tricks. It was working fine, controlling the remote Kenwood TM-V71A and providing good two-way audio. But after cycling power to the RRC it will not boot up. On another good control RRC at power-up, I see a brief flash of the green power LED followed by a steady red and yellow LED on the mic connector for a few seconds. Then the red and yellow extinguish and the green begins blinking until a TCP/IP connection is made. On the problem unit, I see no flash of the green LED and the red and yellow illuminate immediately and simply stay that way.
Another observation: If I power the RRC from the USB connector with 12v disconnected, the unit appears to boot up. Red and yellow LED's extinguish after a few seconds and the green LED blinks fast, per the manual. While in this state, if I then apply 12v power with the USB still connected, the red and yellow LED's turn on again, after a few seconds extinguish and the green LED blinks at a slower rate typical of waiting for a TCP/IP connection. If I then remove the USB connector with the 12v still applied, the RRC seems to stay as it was in a normal state, with the red and yellow off and the green blinking slowly and turning steady on once a TCP/IP connection is made. I can access the RRC over my web browser and all the configuration setup looks fine. Interestingly, I can command "Restart Device" from the browser window and the RRC does successfully boot back up.
If I then drop the 12 v power, wait a bit and reapply 12v, the RRC goes back to a steady ON red and yellow with no green LED and I lose the TCP/IP connection.
If I reverse the sequence and apply 12v first followed by connecting the USB, the RRC stays locked with red and yellow on continuously.
Tried different 12v power sources with no change.
Anyone see this behavior before and have a fix? I have not tried reloading firmware yet. It RRC already had v2.95 loaded out of the box.
tnx
N3AE
Another observation: If I power the RRC from the USB connector with 12v disconnected, the unit appears to boot up. Red and yellow LED's extinguish after a few seconds and the green LED blinks fast, per the manual. While in this state, if I then apply 12v power with the USB still connected, the red and yellow LED's turn on again, after a few seconds extinguish and the green LED blinks at a slower rate typical of waiting for a TCP/IP connection. If I then remove the USB connector with the 12v still applied, the RRC seems to stay as it was in a normal state, with the red and yellow off and the green blinking slowly and turning steady on once a TCP/IP connection is made. I can access the RRC over my web browser and all the configuration setup looks fine. Interestingly, I can command "Restart Device" from the browser window and the RRC does successfully boot back up.
If I then drop the 12 v power, wait a bit and reapply 12v, the RRC goes back to a steady ON red and yellow with no green LED and I lose the TCP/IP connection.
If I reverse the sequence and apply 12v first followed by connecting the USB, the RRC stays locked with red and yellow on continuously.
Tried different 12v power sources with no change.
Anyone see this behavior before and have a fix? I have not tried reloading firmware yet. It RRC already had v2.95 loaded out of the box.
tnx
N3AE