Vizio M551d-A2 No Picture No Sound - I Don't Understand

[53JACK]

Vizio M551d-A2 Serial Number LWJJOJDP No Picture No Sound No Backlights - Please help with me this one. On CN101 pins 1: 5v, 2: 5V, 3: 3V, 4: 3V, 5&6: GND, 7&8:NA, 9&10:GND, 11&12: 12v, 13: 0V, 14: 0V, 15: 3v. On CN102 pins 1 & 2: 24v. On CN202 pins 1,8,9,16: 39.4V. No voltage at F1 on the TCon board. I'm lost on this one, Thanks for any help.

[nomoresonys]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Is the tcon fuse good?

[nomoresonys]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

You didn't label all the pins. Test connector from mainboard to powerboard on powerboard side with all boards hooked up, test with tv plugged in but off then hit power, report both conditions here, give pin number, pin description/name and condition both off and when you hit power on. So we can see all the voltages and what they are doing.

[53JACK]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Thanks nomoresonys, TCon fuse is good. TV power switch or remote does not change anything with these voltages.

[budm]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Need pin number follow by pin name and follow by the readings.
Is Fuse F10 on main board good/

[53JACK]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Thanks again everyone. Main's F10 is good.
CN101
1&2 5VSB:5V
3 AC OFF DET: 3V
4 PS-ON: 3V
5&6 GND
7&8 5V(NC):not used
9&10 GND
11&12 REG 12V: 12V
13 BL ON/OFF: 0V
14 NC
15 LAMP ERR: 3V

CN102
1&2 REG 24V: 24V
3&4 GND

CN202
1,8,9,16 +VLED:39.4
2-7,10-15 VLED

[53JACK]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Well never mind, customer picked up tv said I taking too long. Had it for 5 days, some people... Thanks Sorry to be a trouble

[nomoresonys]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Looks like mainboard wasnt sending bl-on signal.

[budwich]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

lamp error... likely either a led or driver problem. Likely the customer tossed.

[nomoresonys]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

15 LAMP ERR: 3V, this is the clue for lamp error? would it have 0 volts if no lamp error?

[53JACK]

Re: Vizio M551d-A2 No Picture No Sound - I Don't Understand

Thanks Everyone !