Hi, I have a Pioneer elite PRO730hdi set (last of the RPTV Pioneers) and have had a problem with it for the last two years. I will be watching TV (samsung HD sat reciever) and the set will power down and power right back up. This might only happen once a night at first but becomes more frequent with time. At last the unit will power down and not come back on. I have the power board changed and everything will be fine for a few months then the same things starts happening again. I am now on my fourth power board. Thank goodness I bought the extended warrenty (I almost never do). Has anyone had any trouble like this with their set and how was the problem solved? Thanks for any info you might have.