NotTaR of Television Sets : Service menu caution                    
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Service menu caution

Even changing a parameter which results in the loss of the picture could require replacing the EEPROM if you cannot get the set to come on and view the service menu to reset!

However, it may be possible to drive the HOT with an external source so you can see the menus for setup.

CAUTION: there is some risk. Should drive the HOT with too low a frequency, it may blow due to flyback core saturation. Use a series light bulb to minimize this possibility.