Vizio TV Repair, Please Help - Electronic Circuits Projects Diagrams Free

tblake · 15th January 2009, 05:51 PM

Hi Guys,

Thanks so far with the great advice. I have another question I was hoping someone might be able to help me out with.

My friend has a 42" Vizio LCD TV. He's had it for over a year. The warrenty is expired (go figure).

When you turn it on, all that is viewed is a bunch of colored horizontal lines flickering and dancing around all over the place. There is no sound, and no way to access the menu/change channels.

He brought it to Best Buy (where he got it from) and the geek squad looked at it and said it would cost more to repair it than a new one is worth.

I offered to find out as much as I could about the problem and possible solutions for him. I did take a sememster of electronics in college and a single class in HS, so I sort of know what I'm doing. I just dont have a place to start with this TV.

Any help would be greatly appreciated. Thanks Again!

**Nigel Goodwin** · 15th January 2009, 05:56 PM

Check the electrolytic capacitors in the PSU, you need an ESR meter to do this - often this is all that fails.

tblake · 15th January 2009, 06:08 PM

Thanks Mr. Goodwin. I will have a look. By PSU you mean Power supply unit? I'm unsure if this one has an external power supply or if AC power cord is hooked durectly to the TV. I dont have the TV in front of me.

How would I go about checking capacitors? The only time I've ever dealt with them is when they have melted when transistors when out in other electronic equipment.

How could capicitors cause this screwy display output? (not providing enough voltage?)

Thanks!

**Nigel Goodwin** · 15th January 2009, 06:11 PM

Yes, capacitors in the power supply - even if there is an external unit, there is still an internal power supply as well.

You require an ESR meter to test them, although if you're lucky you may spot some with domed tops.

PSU problems can cause all kinds of strange effects.

tblake · 15th January 2009, 06:21 PM

Sorry, my elecronics knowledge isnt up to par (ESR Meter?)

I have a multimeter with all sorts of different settings, am I able to use that to test them with that?

Thanks!

**Nigel Goodwin** · 15th January 2009, 06:37 PM

Quote:

Originally Posted by tblake

Sorry, my elecronics knowledge isnt up to par (ESR Meter?)

I have a multimeter with all sorts of different settings, am I able to use that to test them with that?

No - third time - ESR METER

picbits · 15th January 2009, 07:08 PM

Quote:

Originally Posted by tblake

Sorry, my elecronics knowledge isnt up to par (ESR Meter?)

Based on that statement I'd really advise against messing about with the innards of this set and maybe speak to a local repair guy who will have an ESR meter and the tools to perform other tests without frying themselves

blueroomelectronics · 15th January 2009, 07:12 PM

Unless you can visually see a damaged component, without schematics and a fairly high level of electronics experience your chances of repair are slim to none.

tblake · 15th January 2009, 07:30 PM

well its a big waste of space as it is.

picbits · 15th January 2009, 07:48 PM

Quote:

Originally Posted by tblake

well its a big waste of space as it is.

Just hang it on the wall and pretend you are rich.

I always meant to recess our 32" CRT television into the fireplace to make it look like a plasma many years ago. That was back in the days a plasma cost the same as a good secondhand car

tblake · 15th January 2009, 07:51 PM

Thats a good idea!

I actually just contacted my friend who is not at home, but he told me that its not a visio, its a viore. Does that make a difference?

blueroomelectronics · 15th January 2009, 07:51 PM

Or take the back and backlight off, put it in a window and you've got the nature channel in HD.

blueroomelectronics · 15th January 2009, 07:54 PM

Viroi isn't sold at Best Buy. Where did he find such a obscure TV brand? Either way next time buy the extended warranty.

tblake · 15th January 2009, 08:10 PM

yeah thats what I said, now the truth comes out. Its a Wally World TV they got at Black friday last year for 599.99.

I keep doing research on this TV and come to find out a lot of others are having similiar issues with the main circuit board. They just suggest to replace it. At a price of 150.00 I'm not sure replacing the main circuit board in hopes that it will work is worth it.

blueroomelectronics · 15th January 2009, 08:17 PM

Quote:

He brought it to Best Buy (where he got it from)

Quote:

Its a Wally World TV

Seems to get around.

Worked for 12 months at $600, look at it as a $50 a month rental. If it was mine I'd be upgrading to a 46" brand name with decent reviews and use the $150 towards the purchase price.
You can get a 40" plasma for near nothing these days, although I prefer LCDs and they're cheap too.

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15th January 2009, 05:51 PM	#1
tblake	Vizio TV Repair, Please Help Hi Guys, Thanks so far with the great advice. I have another question I was hoping someone might be able to help me out with. My friend has a 42" Vizio LCD TV. He's had it for over a year. The warrenty is expired (go figure). When you turn it on, all that is viewed is a bunch of colored horizontal lines flickering and dancing around all over the place. There is no sound, and no way to access the menu/change channels. He brought it to Best Buy (where he got it from) and the geek squad looked at it and said it would cost more to repair it than a new one is worth. I offered to find out as much as I could about the problem and possible solutions for him. I did take a sememster of electronics in college and a single class in HS, so I sort of know what I'm doing. I just dont have a place to start with this TV. Any help would be greatly appreciated. Thanks Again!

15th January 2009, 05:56 PM	#2
Nigel Goodwin	Check the electrolytic capacitors in the PSU, you need an ESR meter to do this - often this is all that fails. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

15th January 2009, 06:08 PM	#3
tblake	Thanks Mr. Goodwin. I will have a look. By PSU you mean Power supply unit? I'm unsure if this one has an external power supply or if AC power cord is hooked durectly to the TV. I dont have the TV in front of me. How would I go about checking capacitors? The only time I've ever dealt with them is when they have melted when transistors when out in other electronic equipment. How could capicitors cause this screwy display output? (not providing enough voltage?) Thanks! Last edited by tblake; 15th January 2009 at 06:08 PM.

15th January 2009, 06:11 PM	#4
Nigel Goodwin	Yes, capacitors in the power supply - even if there is an external unit, there is still an internal power supply as well. You require an ESR meter to test them, although if you're lucky you may spot some with domed tops. PSU problems can cause all kinds of strange effects. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

15th January 2009, 06:21 PM	#5
tblake	Sorry, my elecronics knowledge isnt up to par (ESR Meter?) I have a multimeter with all sorts of different settings, am I able to use that to test them with that? Thanks!

15th January 2009, 07:12 PM	#8
blueroomelectronics	Unless you can visually see a damaged component, without schematics and a fairly high level of electronics experience your chances of repair are slim to none. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

15th January 2009, 07:30 PM	#9
tblake	well its a big waste of space as it is.

15th January 2009, 07:51 PM	#11
tblake	Thats a good idea! I actually just contacted my friend who is not at home, but he told me that its not a visio, its a viore. Does that make a difference? Last edited by tblake; 15th January 2009 at 07:53 PM.

15th January 2009, 07:54 PM	#13
blueroomelectronics	Viroi isn't sold at Best Buy. Where did he find such a obscure TV brand? Either way next time buy the extended warranty. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com/

15th January 2009, 08:10 PM	#14
tblake	yeah thats what I said, now the truth comes out. Its a Wally World TV they got at Black friday last year for 599.99. I keep doing research on this TV and come to find out a lot of others are having similiar issues with the main circuit board. They just suggest to replace it. At a price of 150.00 I'm not sure replacing the main circuit board in hopes that it will work is worth it.