Panasonic TC-L50E60 – Service mode, hotel mode, LED blinking codes - 50 inch Class 1080p LCD HDTV

How to enter service mode, factory reset, data copy, service tools and more – Panasonic TC-L50E60 LCD TV
Specification of KEY for DTCP-IP, WMDRM and Widevine
NAND Flash (IC8900) for spare parts has the seed of KEY for each DTCP-IP for DLNA, WMDRM for Netflix and Widevine for CinemaNow.
The final KEY data will be generated by Main IC (IC8000) when SELF CHECK was done and are stored in both Main IC (IC8000) and NAND Flash (IC8900).
When Main IC is replaced, NAND Flash should be also replaced with new one the same time.
When NAND Flash is replaced, Main IC is not necessary to be replaced the same time.
After the replacement of IC, SELF CHECK should be done to generate the final KEY data.
How to SELF CHECK:
> While pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
TV will be forced to the factory shipment setting after this SELF CHECK.
How to enter into Service Mode
> While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.
Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
To exit: Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
Contents of adjustment mode
* Value is shown as a hexadecimal number.
* Preset value differs depending on models.
* After entering the adjustment mode, take note of the value in each item before starting adjustment.
Click on the pictures to zoom in
SRV-TOOL
> Select [SRV-TOOL] in Service Mode.
> Press [OK] button on the remote control.
Display of SOS History
SOS History (Number of LED blinking) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].
POWER ON TIME/COUNT
Note : To display TIME/COUNT menu, highlight position, then press MUTE for 3 sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-checks or any other command.
Exit:
Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on automatically.
Hotel mode
Purpose: To Restrict a function for hotels.
Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu:
> While pressing [VOLUME (-)] button of the main unit, press [INPUT] button of the remote control three times within 2 seconds.
The Hotel mode setup menu is displayed.
To exit the Hotel mode setup menu; Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
Data Copy by USB Memory
Note: SD card cannot be used for Data Copy.
a, Board replacement (Copy the data when exchanging A-board):
When exchanging A-board, the data in original A-board can be copied to USB Memory and then copy to new A-board.
b, Hotel (Copy the data when installing a number of units in hotel or any facility):
When installing a number of units in hotel or any facility, the data in master TV can be copied to USB Memory and then copy to other TVs.
Preparation
Make pwd file as startup file for (a) or (b) in a empty USB Memory.
1 Insert a empty USB Memory to your PC.
2 Right-click a blank area in a USB Memory window, point to New, and then click text document. A new file is created by default. (New Text Document.txt).
3 Right-click the new text document that you just created and select rename, and then change the name and extension of the file to the following file name for (a) or (b) and press ENTER.
File name:
(a) For Board replacement : boardreplace.pwd
(b) For Hotel : hotel.pwd
Note: Make only one file to prevent the operation error.
No other file should not be in USB Memory.
Data copy from TV set to USB Memory
1 Turn on the TV set.
2 Insert USB Memory with a startup file (pwd file) to USB terminal.
On-screen Display will be appeared according to the startup file automatically.
3 Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2770
(b) For Hotel : 4850
Data will be copied from TV set to USB Memory.
It takes around 2 to 6 minutes maximum for copying.
4 After the completion of copying to USB Memory, remove USB Memory from TV set.
5 Turn off the TV set.
Data copy from USB Memory to TV set
1 Turn on the TV set.
2 Insert USB Memory with Data to USB terminal.
On-screen Display will be appeared according to the Data folder automatically.
3 Input a following password for (a) or (b) by using remote control.
(a) For Board replacement : 2771
(b) For Hotel : 4851
Data will be copied from USB Memory to TV set.
4 After the completion of copying to USB Memory, remove USB Memory from TV set.
(a) For Board replacement : Data will be deleted after copying (Limited one copy).
(b) For Hotel : Data will not be deleted and can be used for other TVs.
5 Turn off the TV set.
Check of the IIC bus lines
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.
Exit
Disconnect the AC cord from wall outlet or press the [POWER] button on the main unit for 3 seconds to turn off and then turn on automatically.
Screen display
Check Point
Confirm the following parts if NG was displayed. 
Power LED Blinking timing chart
Information of LED Flashing timing chart.
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
LCD Panel test mode
To find the possible failure point where in LCD Panel or Printed Circuit Board when the abnormal picture is displayed.
How to Enter:
While pressing [VOLUME ( - )] button of the main unit, press [OPTION] button of the remote control three times within 2 seconds.
How to Exit:
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
How to confirm:
If the abnormal picture is displayed, go into LCD Panel test mode to display the several test patterns.
And then, judge by the following method.
Still abnormal picture is displayed: The cause must be in LCD Panel.
Normal picture is displayed: The cause must be in A board.
Remarks:
The test pattern is created by the circuit in LCD Panel.
In LCD Panel test mode, this test pattern is displayed unaffected by signal processing for RF or input signal.
If the normal picture is displayed, LCD Panel must be okay and the cause of failure must be in A board.