Originally Posted by Spit
Update. Service rep contracted by AQUOS Advantage contacted me Monday morning (good sign, right?). Given the flashing chevron code, diagnosed the problem over the phone as a failed power supply. Although they haven't actually looked at the unit, a power supply failure does make a lot of sense given a few previous random reboots. Bad news is that they do not have the part on hand and have to order it, and would not commit to a Wednesday service call. So much for the advertised AQUOS Advantage response time. I'll keep you updated regarding final determination of the problem.
A lesson on all of this is that for those of you who are experiencing the random reboot problem (momentary complete loss of power), get it serviced sooner rather than later because it is an indicator of a more severe problem.
Service tech visited today, but he had the wrong part. Not his fault -- Sharp sent the wrong TV model number to their service contractor. I contacted AQUOS Advantage about this, and although they confirmed that they sent the incorrect model number, they took absolutely no responsibility for it. In fact, they refused to interact directly with their contractor, telling me to contact the service company to ask them to use overnight delivery to obtain the part. Very frustrating and disappointing!
Anyway, from the chevron code, the service tech confirmed that it was most likely a failure of the power supply, and he has seen a number of such failures, sometimes after having the random reboots.