Vizio GV47LFHDTV10A No Picture No Sound Fix

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

As soon as I get home I can get that for you... This wouldn't be about amp rating on that ic would it?

No, I just want to make sure it is not heavy load on the output pin is causing low output Voltage.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Just checked the resistance, 90.2

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

OK, that is fine, nothing <10 Ohms range.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Well parts came in and just finished installing those lil guys. TV powers on as it should with backlight and will now turn off without having to unplug it. I am not sure what is going on with the hdmi ports, plugged in a chromecast and I get nothing on either port. Could it be a setting or are those hdmi ports toast? I did try a dvd player hooked up via rca cables and the picture looks great. The speakers are not plugged in and I wouldnt imagine that interfering with the hdmi ports or am I wrong?

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

So I am curious about the DCV readings now on those two new ICs.
So do you know the history of this TV? It might have been hit by the surge which usually also come through the HDMI ports.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

I never get a straight answer to the tvs story when I pick them up. I mostly just get "oh it just stopped working". This TV was no different so sadly I have no story to tell. So if it was a surge does it typically ruin the HDMI port itself or is it the board that faults out? As soon as I get home I will most definitely get you the voltage readings.

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

You can check and see if the HDMI chips get the Voltage to them or look for damaged chips.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Well budm you were right they are tricky to solder. Got the voltage readings like you asked and it appears I need to revisit DU4

DU4
pin 1-0
pin 2-0
pin3 - 3.32

U5
pin 1-.71
pin 2- 1.97
pin 3- 3.33

You think that could be the cause of the hdmi issue?

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

After revisiting DU4 TV now FULLY works as it should. HDMI all work as they should now, new voltages

DU4
pin 1- 0
pin 2-1.25
pin 3- 3.3

Just want to say a huge thanks to all that chimed in expecially nicktv and budm, couldnt have done it without you. Your knowledge and patience is much appreciated. Learned a great deal with this tv and I have you guys and this forum to thank for that.

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Glad to hear that the TV is working.

[Nick's Tvs]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Bleed4me,
Don't thank me, I only gave you basic info at first. All that more technical advice was from budm.
I am glad to hear that you got the set fixed and working however!

[Electronic Handyman]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

I have the same model GV47LFHDTV10A that has a damaged main board.Anybody have the actual schematic for it?I can only find trouble shooting charts for and I need a true schematic that shows me what parts connect to what.Also if you've the schematic for the audio board and anything else it would be much appreciated.I've had the set sitting in storage so I can give the actual board part numbers but I'd love to fix it.Thank you in advance

[Miragui]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Hi I just registered to thank the members in this thread.

It helped me fix my TV, it had the same symptoms no picture an no sound, checked all the voltage regulators and fuses and U4 was bust. Luckily I could source one from and old Xbox360 DVD drive PCB I had laying around.

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Thanks for the report on what you found bad.

[Maverick67]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Hey I just found this same TV. Someone had put it curbside and I figured why not take a look. Found this thread and dug around. Yup Blown fuse. Up and running now. Thanks for the help.