Question about Sylvania 6620LG 20 in. EDTV-Ready LCD Television

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Sylvania 6620lg 20" tv

Split screen, they say it needs a new main pcb board but I cannot find one anywhere

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  • Hanson323 Dec 15, 2008

    My split sceen is two screens of the same. One on the top half and the second on the bottom half.

    The color is also off.

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  • 16 Answers

By split screen you mean that only half works or is a different color the problem is not the main board but a problem with the lcd itself. It is called cof or chip on film , it is a problem that cannot be fixed.

Posted on Nov 04, 2008

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Posted on Jan 02, 2017

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Horizontal bar across bottom of screen.


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://electro-medical.blogspot.com/
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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If the tuner is bad cable can be hooked via a box or even using a old vcr to the rear jacks===switching to that input and bypass the tv tuner.

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If the remote works ok with tv buttons pcb disconnected, then the problem is the buttons pcb.However, you have no picture..i presume nothing at all including 'no signal message or menu screen'. Therefore, with no bulging caps and correct votages to the main pcb, you will be right to change the main pcb.
PLEASE DO NOT CARRY OUT ANY ELECTRICAL REPAIRS IF YOU ARE NOT COMPETENT TO DO SO..ALL MAINS PARTS ARE DANGEROUS..GET A QUALIFIED TV ENGINEER TO CARRY OUT ANY REPAIRS IF THIS IS THE CASE.

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Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

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