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Vizio tv doesn't turn on after outage. Measured power board: Fuse=0ohms,DC to main board are 5,12,12,24. Measured: 5,0,0,0 cable to main disconnected. Bad power board?

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on May 02, 2017

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Posted on Jan 02, 2017

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The signal is not getting to tv. Try other source on same input. Also check cable. if still not working replace main board.

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there is a surge protector on the main power board this has probably blown. or the main power board fuse or plug fuse. check them one by one. there even may be a secondary fuse in the tv around 3amp witch can blow. it will have red and black lines on it or orange that is the rating of the fuse. surge protector is like a battery shap round with 2 prongs onto the board.

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The other day, my 2007 vizio 32" lcd tv lost picture, sound, and i was unable to turn the tv off via the on/off button on the tv. i had to unplug it to turn it off. i took it to the local tv repair shop. ...


Yes, it can be main board processor problem or it can be cuased by unstable DC power supply due to bad DC filrter caps, if the repair person verify that all the DC outputs from the power supply are OK, then it can be the main board. He need to have a spare board to try for sure. You can look at shopjimmy.com to see how much the boards are.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

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The power boards go bad alot in vizio's, Most likely 4 bad cap's need to be replaced, $10 in parts,,

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Ok.. What is the status of the power LED at the front. Does it blink, change color a few seconds after its turned on? Do you notice any clicking noise from the set?

Please provide this info so that we can continue with the diagnosis.
Sai.

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