Thanks so much for making this awesome thread. I have been battling with this problem for 2 days and this has been hands down the most informative and helpful link I have found, as it has taken me from "time to get a new TV" to "Ok let's fix this!" and I finally have. Either way I'll document my 40 hours of banging my head against a wall here in case anyone else has this problem. Or in case I haven't actually fixed mine yet and I still need more help
Here's the breakdown
MR: Pioneer Pro-R06U
TV: Pioneer Pro-506PU
Application: I have one HDMI cable plugged into the MR going to my windows PC, nothing else.
Issue: 2 days ago the TV turned off, and the MR flashed BLUE LED 12 times. When I turn it back on, it says "Starting Up..." and either turns itself back off, or starts back up and then turns itself back off. Either way, 12 blue led blinks follow.
Research: Google and this forum has led me to believe i need to take the 'TV Guide' feature of this TV out back and shoot it. Hopefully that just means a factory reset.
Solution: First you will need to get into the Factory Service Menu (steps 1-2), and then you need to factory reset the TV (steps 3-5). Some of these sequences seem retarded,
1. Turn the MR to standy with the TV on so that the LED on the TV and the MR are both red.
2. With the Remote Control pointed at the bottom right corner of the TV (where the IR sensor is), Press and release the DISPLAY button, and then wait 3 Seconds. Then press LEFT, UP, LEFT, RIGHT, POWER all within 10 Sec. (took me a few tries, go slow)
3. Press the MUTING button until it says "INITIALIZE" in the top right corner of the screen.
4. Press the UP ARROW until FINAL SETUP appears at the bottom of the screen and then press the ENTER button.
5. Press the LEFT ARROW until the bottom reads "DATA RESET <=> :YES" and then press and HOLD the ENTER button until the TV TURNS OFF.
6. The TV will power cycle, and turn itself back on. Once this happens, turn it back off and on again one more time. A TV GUIDE screen will appear. Select the "never mention this again" option.
Well that's been my experience, hopefully it helps someone out there. My TV is now going on 3 hours without a reset. Hopefully I can get a few more years out of it. I'll be back if it starts acting up again!