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The tcon board usually fails on this model (Vizio E601iA3 and e701iA3) resulting in sound but no picture. Watch how I repair the tcon board with a $.54 cent transistor. The problem is noticeable when it seems like the tv is not turning on. You may hear sound but nothing is showing up on the screen.

Specs on the transistor replaced: MOSFET 60V 2.3A 1.66W 156mohm @ 10V

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