Vizio GV47LFHDTV10A No Picture No Sound Fix

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

NickTV here is the picture you requested.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Had a chance to revisit the voltages and you are absolutely right Budm, there was an error

C3
A=1.42
B=.03
C=0

C5
A=1.42
B=.03
C-0

Thank you for catching that. I checked the fuses on the master and slave inverter and they appear just fine

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

So far you readings look to be OK.
So you have MASTER/SLAVE Inverter setup.
Are the fuse on both inverters OK?
http://www.shopjimmy.com/catalogsear...+GV47LFHDTV10A

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Here are the inverters, hopefully the pics turn out. As soon as I get home I will revisit those voltages and report back. Thank you.

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Can I see the pictures of the inverter board?
BTW, these must be your erro in the readings:
CN3:
PIN 11 A=1.3
PIN 12 B=0
PIN 13 C=0

CN5:
PIN 12 A =5.4
PIN 13 B=1.2
PIN 14 C=0

Pin A on CN3 is directly connected to Pin A of CN5.
Pin B on CN3 is directly connected to Pin B of CN5.
Pin C on CN3 is directly connected to Pin C of CN5.

So there is no way you can have different readings between the CN3 and CN 5.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Thank you Budm for showing me the proper format to write this so everyone can understand, it is much appreciated. Please let me know if I need to make changes to it. Sorry for the confusion

CN2
PIN 1(24VI)=27.2
PIN2(24VI)=27.1
PIN 3(24VI)=27.1
PIN 4(24VI)=27.1
PIN 5(24VI)=27.1
PIN 6 SGND=0
PIN 7 SGND=0
PIN 8 SGND=0
PIN 9 SGND=0
PIN 10 SGND=0

CN3
PIN 1 (24VI)=26.9
PIN 2 (24VI)=26.8
PIN 3 (24VI)=26.8
PIN 4 (24VI)=26.7
PIN 5 (24VI)=26.7
PIN 6 SGND=0
PIN 7 SGND=0
PIN 8 SGND=0
PIN 9 SGND=0
PIN 10 SGND=0
PIN 11 A=1.3
PIN 12 B=0
PIN 13 C=0

CN4
PIN 1 (24VA)=26.4
PIN 2 (24VA)=26.3
PIN 3 SGND=0
PIN 4 SGND=0

CN5
PIN 1 (PSON)=5.4
PIN 2 (12V)=12.6
PIN 3 (12V)=12.6
PIN 4 (12V)=12.5
PIN 5 SGND=0
PIN 6 SGND=0
PIN 7 SGND=0
PIN 8 SGND=0
PIN 9 SGND=0
PIN 10 (5VSB)=5.4
PIN 11 (5VSB)=5.4
PIN 12 A =5.4
PIN 13 B=1.2
PIN 14 C=0


Incoming voltage to main board from left to right
PIN 1 L ON=0
PIN 2 PWDLM=1.2
PIN 3 (5VSB)=5.1
PIN 4 (5VSB)=5.1
PIN 5 (5VSB)=5.1
PIN 6 GND=0
PIN 7 GND=0
PIN 8 GND=0
PIN 9 GND=0
PIN 10 GND=0
PIN 11 (12V)=11.9
PIN 12 (12V)=11.9
PIN 13 (12V)=11.9
PIN 14 PWR ON=5.1

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

pin 4
5.4
12.6
12.6
12.5
0
0
0
0
0
5.4
5.4
5.4
1.2
0

What do you mean by PIN 4?
You need to report in this format: for example
CN5:
Pin 1 (PS-ON) = xxxx V
PIN 2 (12V) = xxx V
PIN 3 (12V) = xxx V

https://www.badcaps.net/forum/attach...0&d=1454187031

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Sorry about that, was working on getting good pictures.

[budm]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

No pin names for each pin to tell us what the function of each pins are?

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Just curious but I know low voltage readings on a power supply board can cause issues, so could a higher voltage reading cause an issue as well? Here are the voltage readings off the power supply board as well as the main board.


pin 1
27.2
27.1
27.1
27.1
27.1
0
0
0
0
0

pin 2
26.9
26.8
26.8
26.7
26.7
0
0
0
0
0
1.3
0

pin 3
26.4
26.3
0
0

pin 4
5.4
12.6
12.6
12.5
0
0
0
0
0
5.4
5.4
5.4
1.2
0


Incoming voltage to main board from left to right
0
1.2
5.1
5.1
5.1
0
0
0
0
0
11.9
11.9
11.9
5.1

[Nick's Tvs]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

bleed4me,
I just replied to your last personal message with a few tips on how to make sure your solder joint was proper since you may possibly have a good top solder connection but bad lower solder joint and still get 5 volts on both sides of the fuse but not actually have the 5 volts run through the board.
Lastly I recently fixed one of these a few weeks ago and may have a prospective buyer in a few days on it. However I still have it in the shop for the next few days at least so if you have any questions on voltage reading on certain parts of the main board, or certain readings on components let me know asap before I don't have the ability to double check for you.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Ok made it home and checked the connects to make sure they were all secure and they are. One thing I did notice though was after looking at Budm pictures of his fix his board has a ground wire that mine does not, would that make the difference?

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

I'm currently not at home to double check but I am almost positive that I connected everything back up.

[johnboy1313]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Well, that's a step in the right direction. Are you sure you got all of the connectors plugged back in?

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Well I replaced the f3 fuse with the link you provided johnboy1313 and I am getting a voltage reading of 5.3 on either side of the fuse and the tv is behaving in the same manner with the same symptoms.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

I am glad somebody finds this easy, for the life of me I can not get this bloody fuse off!! Any tips or suggestions?...never mind I got it...when one fails use two...

[Nick's Tvs]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

I have fixed about 4 of these sets in the past, and all had the exact same issue. Not sure what causes it to go out but its about as easy as it gets for repairs.

[freakaftr8]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Heat and poor build quality I believe is what causes these fuses to blow. Fatigue.

[bleed4me]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

Thank you for that...having the answer is great and all I just like to learn whild I'm here so you explanation is much appreciated.

[johnboy1313]

Re: Vizio GV47LFHDTV10A No Picture No Sound Fix

The 1206 is the footprint of the fuse. The one you posted is a lot smaller than the one I linked. Yours would surely work, but would be a lot harder to solder on.