Question about Samsung HCL5515W 55" Rear Projection Television

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Power but no picture unless unplugged

I was recieving no power to my set and took out the main power board and had it checked by a friend. He found that the main was not sending power to the other boards. He bridged a connection from an XCapacitor at the point where the boards connects that he thought may be failing, just out of curiousity. I reinstalled it and now it works, but when I turn it off I have to unplug the set in order for it to turn on again. I can unplug/plug the set back in without using the power button and it works fine, except for an awful clicking sound the last for about 2 seconds. I purchased a new main power board and installed it, and same problem, no power. Could this be a power cord or AC adapter issue? There is a small mechanism on the end of the cord just before it plugs into the board, could this be the problem?

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  • Anonymous Apr 27, 2008

    I turn on TV but wont stay on.. so i apreciate any help..

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I need to know what was jumped first to know how the set was whats called "forced on".

Posted on Mar 17, 2007

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Vizio E3d420vx. It turns on but the picture is only at the top of the screen about 1/2 in and the rest is black, sometimes it has grey bars running vertical in the center kinda like a upc bar code.


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 digital board./

Apr 07, 2018 | Vizio Televison & Video

1 Answer

LED TV no picture, but sound. Did flashlight test and determined backlight is the problem. Power supply/inverter or bad LED?


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/

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.

Jun 17, 2016 | Westinghouse Televison & Video

1 Answer

No picture - audio ok. Power cycled (unplugged for 30 seconds) but didn't resolve. Picture comes on when powered on, disappears after a second.


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/
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.

May 24, 2016 | Westinghouse LTV-27w7 7 in. LCD HDTV

1 Answer

What can I do to fix this problem with this sceptre tv?


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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1 Answer

Why Vizio E241A1 LED TV will turn on, but no picture or sound. Is this the Power Supply Board or the Main Board?


Fault with the main power supply regulator section. Either it will be on a separate board, or on the part of its main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Jul 19, 2015 | Vizio E-series E241-A1 24" LED TV...

1 Answer

My phillips hdtv turns on with blue light but no picture and wont turn off unless its unplugged remote and buttons dont work either


Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Apr 11, 2015 | Televison & Video

1 Answer

HI I have a 3 yr old Samsung LN3242 LCD Tv. Last night the picture on the tv went out and a high pitched squeal started. By the time I got up to unplug the tv smoke was coming out the back. I unplugged...


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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3 Answers

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http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find

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1 Answer

Red light blinks no picture or sound


took the board to friend who works on TV's.he tested the board and replaced the 2 black IC's #STK 392-040 .I re-installed the board and TV so far is working fine. hope this helps !

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2 Answers

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