20 Most Recent Vizio VW42LF 42 in. LCD HDTV - Page 3 Questions & Answers

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Most likely you have 4 leaky 470uf 35v capacitors on the inverter boards. I have repaired many of these sets with this problem. The total cost is about $5 in parts. Are you wanting to repair it yourself?

I have a similar problem with HULUplus - I think I'll return the TV to WalMart and try another brand. It's the second VIZIO I bought in the last 5 mos. that has had issues. The first TV had popping (sounded electrical) sounds, also cut out sometimes. Would U-Verse have something to do with it? That may be a dumb question, but who knows?

Chec the back-light inverter and back-light CCFL lamps. Replace them, if found faulty.

When you say popping, was the sound coming from the speakers? or from the back of the set? My initial suspicion would be power supply capacitors.

MOST LIKELY YOU HAVE FAULTY CAPACITORS ON THE INVERTER BOARDS. THEY SHOULD BE 470UF 35V TYPES. THERE SHOULD BE 2 ON EACH INVERTER BOARD. If the tops of the capacitors are bulged, that's most likely your problem.

is there any sound? Did you order the exact main board part # as your original board?

After replacing the main board, a software update will be necessary in most cases. Check it.

The main board needs replacement. Yoiu can get the main board from www.tvrepairworld.com

Which manual are you needing? If its the user manual you can usually get one by typing your model number into the search box on www.retrevo.com

check out the power supply board! Look for popped capacitors. They either leak or swell up. They are the can shaped things on the board with the plastic coverings on them...you can usually see a swollen cap sticking up over its covering as a telltale sign.

Good luck and be careful

There have so many reasons for this fault. have to check from its main power supply regulation section to its display panel. Contact any experienced service technician.

The set will need to be serviced. There are several things that could cause this. It could be the main board or power supply that has an issue.

Check the capacitors on the master/slave inverter boards. I just repaired a Vizio VW42LHDTV10A with the same problem. Cost to repair $2. The master and slave inverter boards should be on the far left and far right sides of the TV set. They both have metal covers installed over them so you will have to remove the covers to access them. I'm willing to bet the tops of your capacitors are bulged.

That sounds like a main board failure, I've had a few of those with Vizio sets. But get a proper diagnoses to be sure

It sounds that the firmware have been currupted. Contact the authorised service center for details. The set do not reset. That is the fault.