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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
To enter service mode do the following:
1) Press the mute button on the RC once.
2) Press the mute button again, and hold it down.
3) With the mute button still held, press the Menu button on the TV.
But to be honest, there's no way the adjustments (which are stored in EEPROM) are going to be affected by a 'knock'.
More likely the tube has been damaged, or the PCB cracked.
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