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Tv wont power on what can i check - Hitachi 50VF820 Projection TV

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Check the power suply if you are geting any volts in and out

Posted on May 23, 2011

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Posted on Jan 02, 2017

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Check circuit breakers, fuses, and wired connections. In some cases a power surge can disrupt the power board. If you had a power outage and the TV was plugged into the outlet, s surge can damage vital parts.

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Check for any bad solder on the mainboard of the TV, and also check for any burn fuse on the powersupply area... BAd solder was very common problem on Mitsubishi TV..

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If you want to DYI this tv yourself be careful for voltages.
Check the power board for standby +5 volt to the power botton.
If there is none, check the powerboard for open contacts; fuses, fried resitors or the FET. A photo-coupler sometimes is also the problem. Its a small black part with 4 to 6 pins that overbridge and regulate the need for voltages from the main and the powerboard.
If there is power but the tv still wont start, check the horizontal output.

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