Re: Vizio E321VL



Correction: I meant to say U5 and U8 measured zero volts on all pins, and U4 measured normal voltage....

Re: Vizio E321VL



Correction: I meant to say U5 and U8 measured zero volts on all pins, and U4 measured normal voltage....

Re: Vizio E321VL

Thanks budm for your comments. No voltages were measured on U4 or U5 so something must be shorted somewhere. This failed during a storm, so maybe a spike came in through the cable connection and did some damage to this board. Without a schematic, I may not waste any time with this.

Re: Vizio E321VL

Thanks Worminizer for your comments. As I mentioned in the post these readings are in ohms, and that there is no voltage measured at U4 and U5 (zero volts). Could be bad regulators, or other shorts on the board I suspect.

Re: Vizio E321VL

Vizio E321VL, with AmTR board 3632-1512-0150 (4D)

I have 5.05 volts at power supply board and no 12 volts, but can turn on 12 volts with the 3 volt input to the power supply board, therefore think the power supply board is ok.
There appears to be low voltage problems on the mainboard at the regulators, but without the schematic I do not know which parts affect the others.

I have not seen anyone report the resistance readings at all three of these regulators, but here are my readings in ohms, measured from pins 1, 2, and 3 relative...