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Vizio E420-A0 - NO power on    
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Joined: 11 Mar 2016
Posts: 1

PostPosted: Fri Mar 11, 2016 3:05 pm    Post subject: Vizio E420-A0 - NO power on Reply with quote

I have a 3 year old Vizio E420-A0. For a few weeks now I had lots of problems turning the tv on. The power button on the tv should be the only way to turn it on but I would have to press it 3 or more times. Then one day it wouldn't turn on at all. So I opened the tv. All the competitors and everything looked fine. So I tested the voltage to the main board and it was good then I tested the power button and sensor and they where good too. I replaced the main board to see if the problem was there and the tv still hasn't turn on.

When you plug the tv in the power indicator turns on bright and then fades away. Then I try turning on the tv with the remote and side buttons and nothing happens.

My only guess is to try to replace the power supply board to fix it. I would like some with any ideas what is wrong.

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Joined: 21 Jan 2009
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PostPosted: Sat Mar 12, 2016 1:38 am    Post subject: Reply with quote

I'll assume you mean capacitors ... NOT competitors.

How sure are you that you received a 'good' Main board?

Most contain a IC that 'may' be involved with your symptom (depends on board/variant number). For example:
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