Dead Vizio VO320E

[islandguy5]

Good morning techs. Need some help. I have been in electronics for over 50 years but as you know it changes fast and left me behind.
I have a Visio VO320E that is completely dead. I know it is old but if possible I would like to repair it to component level. I have located a few components that are bad and have ordered them from somewhere on the planet.
I have circled the components that are bad. Two FETS and one Thermal resistor.
I assume this has something to do with the display in some way. Any help would be great.

[lotas]

Re: Dead Vizio

They are in the backlight inverter.

[islandguy5]

Re: Dead Vizio

They are in the backlight inverter.

An inverter takes DC and makes AC. So you need AC to run the back light is that correct? These FETs are gated by the AC?

[lotas]

Re: Dead Vizio

They power high voltage transformers

[islandguy5]

Re: Dead Vizio

They power high voltage transformers

Thanks for your response. Are they the two larger flat transformers on the power board? If so might one be defective, causing the fets to go? Where might I get some information on this circuit.

[dskall]

Re: Dead Vizio VO320E

Your backlights are fluorescent tubes. You will probably have to compare resistance between each of the transformers.