VIZIO VO42L No picture, No Sound

[pposey]

Re: VIZIO VO42L No picture, No Sound

also the one behind it...U7...its showing an output of 23.5...input 2.05...tab 1.01

[tom66]

Re: VIZIO VO42L No picture, No Sound

It sounds bad, the output should be the rightmost pin (tab facing upwards) + 1.25V, so in your case at least 2.5V, but it is only 2.05V.

I believe on these Vizios that U33 causes two others, U5 and U7, to also look bad - but it is only U33 at fault in this case.

[pposey]

Re: VIZIO VO42L No picture, No Sound

Ok i ordered the U33 regulator off of digikey. Thank you for all your help! i will post back to tell you if it worked!

[yfriend]

Re: VIZIO VO42L No picture, No Sound

Hi. First of all, thank you for this topic. I have same problem and now I check power readings. My question is. What voltage reading should be on main board fuses? Thanks

[budm]

Re: VIZIO VO42L No picture, No Sound

There are two fuses on the main board, one is for 5VSTBY, and another one is for SWITCHED 12V which will not be present until the main board sends out the PS-ON signal to the power supply board to turn on the rest of the power supply.
Did you test the Voltages of the Voltage regulator ICs yet?