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I replaced the three circuit boards in the back of my TV and I still have a black screen but lights up. Not sure what to do next. Any suggestions?

Posted by Al Sandrok on

2 Answers

Larry

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In a dark room, does the tv have a blue glow to the screen?

Posted on Feb 09, 2023

Testimonial: "It did. After talking with Vizio support, they determined the screen was bad. I decided not to pursue further repair. Thanks though!"

Rudra Pratap Singh

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  • 43 Answers

If replacing the circuit boards didn't solve the issue, here are a few suggestions that might help you fix the black screen issue on your TV:

Check the cables: Make sure all the cables connecting your TV to the wall and to other devices are securely plugged in and not damaged.

Reset the TV: Try resetting your TV to its original factory settings. This may resolve the issue if it was caused by a software problem.

Check the power source: Make sure the TV is receiving adequate power and that the power source is functioning correctly.

Try a different input: Try connecting a different device to the TV, such as a DVD player or a different cable or satellite box, to see if the problem is with the TV or with the source.

Contact a professional: If you have tried these steps and the issue persists, it may be a hardware problem. In this case, it's best to contact a professional for further assistance.

If you still have the warranty for the TV, it may be best to utilize it for repairs.

Posted on Feb 08, 2023

Testimonial: "Thanks for responding. I started with doing all the hard resets and whatnot. I haven't hooked anything to the inputs yet only because I haven't gotten to get a main pop-up screen or menu selections. The guy who gave it to me said it was out of warranty and needed to go to an outside source for repair and so he just bought another TV and put this one up for free. I'm just wondering now if there really is something serious and it just returned the circuit boards."

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
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To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main digital board.
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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/ To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.
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