VIZIO M551D-A2 completely dead

[nosugartonight]

Can someone tell me which board has failed, power or main. Its a vizio m551d-a2, ver. LWJJOJBP2202120. There is no sign of life. No standby light, "nothing" Voltages on connector to main board are. Pin 1-5vsb=5.10v,pin 2-5vsb=5.10v, pin 3-ac off det.=3.27v, pin 4-pson=3.10v, 5&6 GND=0v, pin 7-5v nc=0v, pin 8-5v nc=0v, 9&10-GND=0v, pin 11-reg 12v=0v, pin12-reg 12v=0v, don't know what pin 13 and 15 are labeled but 13 reads 0v, 15 reads .61v, The connector just above is labeled reg 12v and reads 0v on both pins. Across the big capacitor reads 389.6v. No change pressing the power button. Also take a look at the pic of the transformer, looks to me that it got hot or is this normal. Thanks for any help.

[budm]

Re: VIZIO M551D-A2 completely dead

Right now he PS-ON is present so the PFC Voltage booster is working, 389.6V PFC Voltage is present, but the switched 12V, 24V power supply section is not running.
Is this the exact same board as yours?
https://www.shopjimmy.com/vizio-56-0...led-board.htm#

[nosugartonight]

Re: VIZIO M551D-A2 completely dead

I was thinking the Power board. But wanted to get someone else's thoughts with experience. Thanks Budm for replying. When I looked up the "151" board, showed it was for m551d-a2r. I knew then the 161 was the same. Thanks again.have a safe 4th

[nosugartonight]

Re: VIZIO M551D-A2 completely dead

I wanted to ask what you thought about the transformer. Meant to last post but forgot.

[R_J]

Re: VIZIO M551D-A2 completely dead

I see nothing wrong with the transformer. What do YOU see that seems bad?

[nosugartonight]

Re: VIZIO M551D-A2 completely dead

Budm, thanks tv up and running couple weeks , was PB.

[budm]

Re: VIZIO M551D-A2 completely dead

Thanks for the follow-up.