Question about Syntax LT30HV 30 in. HD-Ready LCD Television

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Screen is black, and then turns blue for a sec when you turn off

Ok, here is the issue. I got this tv from my uncle to see what I could do to fix it. So the screen is black he said there was sound and when you turn the TV off the screen will turn blue for a second and then goes off. I have done some research on line and most people have discovered that the inverter board has gone bad, but none of them ever mentioned that the screen would turn blue when the TV was turned off. I ohmed all of the Transformers on the inverter board and the ohmed out correctly. I don't think this is the problem. do you have any possible suggestions what else could be the problem?

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Verify that for sure you do not have open winding on the seconday side of the inverter transformers (this is a common failure), also check all the surface mounted fuses on the inverter board.
Power supply filter capacitors look OK, no bulging tops?

Posted on Oct 29, 2009

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1 Answer

Why does it turn from blue to black after 10 sec.?


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.

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KP57WS500 Screen turns Blue and then shuts off. Can this be fixed?


Hi Friend,
Please folliow the below steps one by one

Step 1: Turn on the TV

Step 2: Hold the ON/OFF Button for 10 to 20 Secs

Step 3:Without taking the hand from the ON/OFF button unplug the power cable connected to the wall outlet from the TV

Step 4:Without taking the hand from the ON/OFF button put the power cable back to the outlet

Step 5:Now take the hand from the ON/OFF Button and try to turn it ON again and check

Even after that you are facing the same issue please check with the Display Card in the TV,

If you have any Clarification please feel free to contact us

Regards,
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