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GV47L FHDTV20A Black screen

 
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CARLS1



Joined: 02 Aug 2010
Posts: 1

PostPosted: Mon Aug 02, 2010 9:52 pm    Post subject: GV47L FHDTV20A Black screen Reply with quote

Unit powers up, contol touch pad lights up but does not function. unit 3 years old out of extended warranty.
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Justmanuals



Joined: 21 Aug 2004
Posts: 1949

PostPosted: Mon Aug 02, 2010 10:19 pm    Post subject: Reply with quote

This Parts & Service manual can now be purchased for $11.77 and downloaded immediately after payment from http://www.justmanuals.com


[email protected]

BTW........I sell more Vizio TV manuals than all other TV manufacturers combined. Although I do have a friend who has one and swears by it.
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Jakeklem



Joined: 17 Nov 2010
Posts: 4

PostPosted: Sat Nov 20, 2010 3:53 am    Post subject: Reply with quote

Hi did you ever have any luck fixing it? You may want to check the surface mount fuses on the main board as that seems to be a common problem in these tvs.

My gv47l is also not working. I found a burnt resistor at R847 on the power supply board. Does anyone know what part I need to replace it?
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mpegcto
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PostPosted: Tue Feb 15, 2011 3:35 am    Post subject: Fixed GV47L Reply with quote

While watching a good movie - my screen went light blue ( assuming just the backlights were on) with no picture. The remote would not turn the set off.

I unplugged it ...repowered it and the remote would turn it on but only had a black screen and no other remote control functions....

GV47L 10a manufactured Nov 2006....

Like any good engineer i immediately removed the TV from the wall and grabbed another tv to finish the movie

Opening the set up (wow there are a lot of screws) i saw NOTHING unusual nor did i smell anything burnt.... I started digging around and found that all the caps looked perfect, power supply seemed to be working ok then i noticed 3 surfaced mount fuses on the motherboard and one on the master inverter.

The one on the master inverter was fine but f3 on the motherboard was open - this is one of three little fuses on the top right hand side of the main board - right under the power connector as to the left of the audio connector.....

i did some checking online and found that others had this problem and replacing the fuse did the trick.

i could not find a 1.5amp /125v surface mount fuse not even at Fry's - what i did find is a 1.5amp / 250v 2ag fuse at Radio Shack ( 4 of them for $2.99) soldered some pigtails and then soldered the pigtails inline with the old f3.....made sure that everything was clean and insulated and wow - it worked.... My GV47L did not become a big doorstop....

while i was at it i figured i would try to fix the audio buzz that seemed to be caused by the backlighting....some people reported it might be a grounding issue but i saw nothing definitive so........

i built a shield for the audio card and moved the ground to the main board ground and buzz is gone....i wish i thought to take pictures while it was all apart

so this is a long way of saying thank you to everyone on this board that helped me discern the issue


tip - if you look around the service manual is available online for free
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