vizio vo42oe 42"lcd heat problem

[Grn94hatch]

Re: vizio vo42oe 42"lcd heat problem

It stays orange.

[1beertap]

Re: vizio vo42oe 42"lcd heat problem

You need to verify if the back light is flashing on briefly by going into a dark room or by turning the lights out. Look closely through the holes around the edges of screen and press the power button again. If the back light comes on and goes off, I am suspecting the main board has an issue. If the back light does not come on at all, then the power supply/ inverter board has an issue.

You checked the standby voltage to be at 10.6 volts. It is high. Just make sure that you are using a good ground screw on the board for your black lead and the red lead to connect to the three 5v pins. You can check to see if you have voltage at the power button. It should be close to 5 volts and when pressed it will read 0 or zero volts. This will tell if the standby voltage is passing through the main board. If it is, then test ON/OFF pin on power supply for a signal. This signal, coming from the main board, will tell the power supply to turn on or off. Your meter may not be fast enough to read any voltage since the tv might shutdown just as soon as you turn it on.

[Grn94hatch]

Re: vizio vo42oe 42"lcd heat problem

A

[Grn94hatch]

Re: vizio vo42oe 42"lcd heat problem

No backlight at all and 10.6 is what I got on all the stand by terminals again..

[1beertap]

Re: vizio vo42oe 42"lcd heat problem

No backlight at all and 10.6 is what I got on all the stand by terminals again..

You definitely have a power supply/inverter board problem. The 10.6v should be around 5v for standby. You could fix it in two ways. First, by finding the faulty component(s) and replacing them. Some possible areas of concern would be capacitors and regulators. Second, replace the entire board. You can find entire board at Tri-State Module for $42.95 plus shipping and comes with a 6 month warranty.

[Grn94hatch]

Re: vizio vo42oe 42"lcd heat problem

The caps look ok visibly, could the problem be internal? Where are the reulators located on the power supply?

[1beertap]

Re: vizio vo42oe 42"lcd heat problem

I don't know the part numbers on the regulators, but I think that one of them is for 12v and the other is for 5v. See attachment on location.