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One thing I have done in a pinch, is to slip some nylon tubing similar to aquarium hose over the shafts of the controls, leaving it long enough to reach the back of the set and twist that. Then it can be as long as it needs to be and you don't need to constantly line up screwdrivers. Make sure you wait for the TV to be really warm (on for greater than half an hour) before attempting this adjustment or you will be doing it over and over again. Also, if your line voltage is really 137V, there is a problem with your wiring (probably a loose neutral), and you should get that fixed right away. 137V is way too high. If you actually meant 127V, then I guess it's within tolerance but still not so good.
Some TV sets have multiple taps on the power transformer for high and low line voltage - if yours is so equipped make sure it's set to the 125V tap.
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