TV service menu / secret code to enter factory mode

tvservicemenu.blogspot.com provides this information for those who are qualified and trained to do Television repair work. Entering or making change in servicing mode menu / service mode entry data by untrained persons can cause significant and permanent damaged to your television system. If you are not qualified to repair it, please DO NOT ENTER TV factory mode using these service menu codes, Call Service Center.


ANSONIC
From the control
remote, press MENU to enter INSTALL (FEATURE), introduce the sequence
4, 7, 2, 5. To select the item you press CHANNEL + / - to adjust the
value press VOL + / -. To save changes press the red button. To
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General Electric
Turn on TV. Press the MENU button and keep it pressed while pressing POWER and
then VOL +. P00 is displayed and V00. Press VOL + to indicate
V76, then press CH + / - selecting items and VOL + / - the standard of the same. To exit and save changes, press POWER. Please note: 
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Press RECALL AND VOL-in remote control simultaneously. To move the sub-menus
Factory, Balance B / W Adjust and press RECALL again in the remote and VOL - in the TV simultaneously. Item to select channel up or down to adjust value volume up or down. To save changes, MUTE on the remote.
simultaneously. 
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Panavox 14HAC
Television off (std by mode), press the remote control, the following sequence press DISPLAY MENU, 3, 8, POWER, turn on the TV in the service mode. Enter the option "Adjustment". To exit and save changes to shut down your television.
Recommendation: DO NOT alter the values shown in "OPTION".
Open remote control, 
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Audinac ST-2157
Turn off TV, using the remote control RD3401A press the following sequence DISPLAY MENU, 3, 8, POWER, turn on the television in the service mode. Enter the option
"Adjustment". To exit and save changes to shut down your television.
Warning!!! DO NOT alter the READMORE


Goldstar
With the TV on, press MENU on the TV while pressing MENU on the
remote control. With CANAL + / - select the item and VOL + / - changes the data. To save the changes, since the remote control press 
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Aurora MRT-CT20D
Turn on TV,ignition pressure in the Remote control MENU, QWIEW, MUTE. With press PROG + / - select the item, with volume + / - changes the value by pressing the 
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Atec-Panda
Turn on TV, press MENU on the TV and press MUTE while the
remote control.Change value press 
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Service Menu Basic Line
From the remote control, press MENU to enter INSTALL (FEATURE), introduce the sequence 4, 7, 2, 5. To select the item you press CHANNEL + / - to adjust the
value press VOL + / -. To save changes 
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Service Menu Bazzomba
Service Menu Bazzomba. Press volume - till no sound, press recall on Remote Control hold down vol - on tv  panel simultaneously, press again recall on Remote control, 
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Beko CTV
Service Mode Simultaneous press chanel + & P- on local tv panel and
then power on with
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BlueSky
From the remote control, press MENU to enter factory mode/INSTALL (FEATURE),
introduce the sequence number 4, 7, 2, 5. To select the item you press CHANNEL + / - to adjust the value press 
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Reference for electronic technician only  !!!