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Tim Nolan
Tim Nolan, TV Repair Technician
Category: TV
Satisfied Customers: 19454
Experience:  Factory trained TV repair technician. U.S. NAVY trained.
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my vizio vf551xvt screen is totally out. tv comes on and has

Customer Question

my vizio vf551xvt screen is totally out. tv comes on and has audio. I wish to find out the cause and what to do to fix it.
Submitted: 1 year ago.
Category: TV
Expert:  Tim Nolan replied 1 year ago.
Hi! My name isXXXXX am happy to help you with this! Please bear with me and be patient as sometimes these issues take a little bit of figuring out before we know what's wrong. If you could give me some more information it will be very helpful:

-If you push the MENU button on the tv itself, does the menu show up?
-if you look close at the screen in a dark room, do you see a slight glow to the screen?
-How old is the unit?

Please give me this information and I will be happy to assist you further.
Thank you,
Tim Nolan
Customer: replied 1 year ago.


No. The screen is total out. Can't see anything on it.

Customer: replied 1 year ago.


No. The screen is total out. Can't see anything on it.


Customer: replied 1 year ago.


Hi Tim, the screen is totally out, can't see nothing with or without flash light.

Expert:  Tim Nolan replied 1 year ago.
If there is no glow to the screen then you have a backlight problem, this is either a bad power supply, main board or led driver board.


Do you have/know how to use a meter?

Tim
Customer: replied 1 year ago.

Sure

Customer: replied 1 year ago.


yes

Customer: replied 1 year ago.


Yes. Have taken voltage readings on power supply cn2,3,4&5 and get readings per shown on the board by the connector.


 

Expert:  Tim Nolan replied 1 year ago.
All output voltages of the power supply are good?

Tim
Customer: replied 1 year ago.


They read as printed by each connector.

Customer: replied 1 year ago.


Yes, I believe so as they are as printed on the board be each connect plug to the board.

Expert:  Tim Nolan replied 1 year ago.
Look really close at the screen in a dark room, just as you turn it on...do you see a slight glow to the screen for a split second?

Tim
Customer: replied 1 year ago.


Not a flicker of light. When the screen first died, it was a dark picture for a few seconds then went totally dark and staying that way.

Expert:  Tim Nolan replied 1 year ago.
You say it do that just one time or several times when you turned it on?

Tim
Customer: replied 1 year ago.

Just one time. I turned the tv on and the screen dimly lite with a dark picture then proceeded to fade out to totally dark. It displays no sign of light at all when turned on since that first time.

Expert:  Tim Nolan replied 1 year ago.
Sounds like we have a bad LED driver board then.

6917L-0012b sit the part number you need, looks like about $80 on ebay is the only place I can find them.

Tim
Tim Nolan, TV Repair Technician
Category: TV
Satisfied Customers: 19454
Experience: Factory trained TV repair technician. U.S. NAVY trained.
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