TH-42PZ800U 10 Blinking Red Lights on Power UP
10 blinking red lights on power up
AC/DC Board thingy: ETX2MM702MF H
This was my solution for 10 Blinking Red Lights after turn on.
MFG Date: May 2008
Obtained new May 2008, and average use 10 hours per day since new; no problems to date; until last week.
Environment: Heavy dust environment
The fix: Take the back cover off and clean out the dirt - many of the components on the board were not even visible for all the dirt.
Tools used for cleaning, both are important:
1) Portable Hoover Vacuum, with narrow crevice tool. This removed most of the dirt in all areas, including the fan blades, and the surfaces of all heat sinks, and all visible components.
2) Compressed air can: One large can as a minimum; I used the long very slender tubes to get behind components and reach places the vacuum would not go.
Pict 111: This is after the first cleaning. I actually clean it twice. Sorry no true before or true after pictures.
Pic 114: The two square components (transformers?), with the yellow tape bindings may or may not have thermal fuses under the tape on the back side of those transformers next to the circuit board. These are not visible, unless the transformers are removed and the yellow tape is remove. This is just one of many examples of using the compressed air can with the tube attached. The skinny tube will slide into and next to the yellow tape to the back of the circuit board and blow out the dust accumulated on the back side of those transformers.
Pic 123: The 6 silver heat sinks visible below the input connections were covered solid in dust, almost invisible for the dirt load. There are more of those behind the black speaker boxes.
Pic 125: The power switch below the left speakers box. The switch is black with a tiny white connecter; that entire area was covered in dust, and hid the switch from view. After removing 98% of the dust with the vacuum, the remaining dust was blown out by using the tube on each side of the black switch. It was a little bit amazing the amount of dirt that came out of the inside of that switch.
It does take a lot of time and patience to do this. Almost two hours on the fans alone. Overall, about 8 hours.
There are numerous possibilities for 10 blinking lights on power up-see document attached - whoops it will not let me upload this, must be a copyright? All stuff I am not going to spend the time or money to do.
In this case just a good cleaning appears to have done the trick. If it stops working again, that means there will be a new TV to replace it.
With basically 10 years use at 10 hours a day, I have made only two adjustments to the TV after the first month of original adjustment settings. About 2 years ago I went +1 to picture control and last month I went +1 on brightness control. This have been the best TV I have ever owned.
Can’t wait until Panasonic brings back something back to the market, that I will like.
Last edited by HoustonPerson; Yesterday at 05:05 AM.