I purchased my Panasonic plasma tv several years ago and started experiencing the problem described on the title above. I was lucky enough to order the TNPEEP jig a part that panasonic has stopped selling, it is also referred to as TNPX25JIG. I can rent it out to you for a nominal fee if you are having this problem. Send me an email or post a note with your email address.
I provide this information for those that are qualified and trained to do TV repair work. Entering or making changes in service mode by untrained persons can cause significant and permanent damage to your television. If you are not qualified to service your television, please DO NOT ENTER these service menu codes.
To sum up the instructions:
1) Remove one screw in the back of the plasma in the top left to access connector PA23.
2) Plug in the EEPROM (the part # above), and turn on the unit.
3) Go to serviceman mode (see instructions below)
4) Go to EEP "AREA" and press "OK"
5) Press > cursor button twice to slect "15 9C FIX", press "OK"
6) Select EEP "EX > IN" and "15 9E _____" will begin flashing yellow/purple once data transfer starts. (about 30 seconds)
7) When EEPROM data update is done, the unit will turn off and back on.
Wait for it to power itself back on. (about 30 seconds)
FOR SOME FOLKS THE POWER DOES NOT COME BACK ON AUTOMATICALLY. IF THIS HAPPENS TO YOU DON'T PANIC. USE THE POWER BUTTON ON THE TV TO TURN IT BACK ON AND NOT THE POWER BUTTON ON THE REMOTE.
8) Do some self checks if you like
9) Disconnect AC cord, remove JIG, and turn it on.
Serviceman Mode for
PA25UP / PD25UP / PX25UP :
* Using the remote control:
* Press the {MENU} button.
* Set "Antenna A" to "Cable".
* Select "Timer" menu and set sleep timer to 30 min.
* Press {OK} twice to exit menus.
* Tune to channel 124.
* Press and hold {VOL -} button ON THE PLASMA TV.
(You will also see an AREA selection at the bottom of the screen which you will use when you go to fix the 1/3 screen problem)
"CHK" appears in on top-left corner followed by 5 letter/numbers
(which are the cumulative hours in hex numbers)
* While the "CHK" is displayed, press the {OK} and {VOL+} buttons
ON THE TV simultaneously to toggle between Modes:
— Red "CHK" for Serviceman — Yellow "CHK" for Aging —
* Press the {POWER} button on the remote to select one of the six
Serviceman Adjustments Modes.
A. MTS ADJUSTMENT
B. CLOCK ADJUSTMENT
C. VIDEO ADJUSTMENT
D. HDEF ADJUSTMENT
E. VDEF ADJUSTMENT
F. DAF ADJUSTMENT
G. OTHER ADJUSTMENT
* Press {CH+} {CH -} on the remote to select the settings
on each of Service Adjustment Modes.
Write down the original values before modifying anything.
It's easy to erroneously adjust the wrong item.
* Press {VOL+} {VOL -} on the remote to change values.
* Press the {POWER} button on the TV to exit the service menu.
10) Enjoy, your plasma is fixed!!!
Please do not curse, yell, scream at me if you don't follow the instructions properly. You are doing this at your own risk.
