Previously today I was able to utilize my RNS510 D for approximately 90 minutes without issue. Upon shutting off the Egg, letting her sit for another 90 minutes and then restarting the engine, I was met with blank buttons on the screen of the RNS.
I cycled power from the radio's face, then cycled the Egg's power, and then performed a hard reboot to the radio. All to no avail. After the quiet return journey I physically removed the RNS from the vehicle in order to let it sit unattached for 60 minutes. Upon inspection of the removed RNS I noticed this smokey discoloration on the posterior of the unit. This rubber protrusion connects to a bolt coming from the RNS to use as a support. I was able to unscrew the rubber from the bolt and the metal was clean underneath, along with the smoky discoloration on the exterior, leading me to believe that the smoke had not come from the inside of the RNS. (That's something I'll have to look in to during the daylight.
All menu buttons in all screens of the unit are blank, however I was able to access the "secret menu" and it did display some information of which I will include below. I'm pretty ignorant of the goings on in these menus, but the only disparity that was obvious was "tempStatus Degraded". Some brief googling told me that was nothing really to worry about, however taking in to account the magic smoke attached to the rear of the case, I don't really know what to think about it. Also, as I was rebooting the RNS while it was in a semi-recessed state in the dash, the hard drive sounded... different... than i was used to, that may have just been because it wasn't fully seated. I'll have to look more in to that in the morning. My first thought was potentially a bad HD, but I don't know enough about these systems to know where the firmware is stored.
My first thought is corrupted firmware, but I don't know how or why it would have been corrupted after running well for the past eight years.
My second thought was a bad hard drive. In the contents of the "secret menu" it showed 13136113664 under Remaining Size. If the units for that are bytes, then that would be correct. I didn't know if a corrupted hard drive would show a correct amount of free space.
Thank you for you time and looking.