Question about HP LC3040N 30 in. HD-Ready LCD Television

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Hp lc3040n tv screen flaches then goes black. changed inverter and motherboard! no help.

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How about the power supply 24vdc output?

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com

Please post back what you find.

Posted on Jul 22, 2010

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I have an HP LC3040N /MODEL:HSTND-3L02. The screen is black, and it has sound. The right side of the screen lights up for 3 seconds, then goes black. Is there a replacement light/s for my TV?


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..

Nov 13, 2016 | HP Televison & Video

1 Answer

My 40"flat screen TV goes black after ahwile the


Check its backlight inverter board, and CCFL lamps. In most cased, the back-light inverter board might need replacement. Check all the CCFL lamps too for any black edges.

Jun 10, 2013 | Televison & Video

1 Answer

Polaroid LCD tv - model TLX-04244b . Flashes the blue polaroid screen then goes black ,I hear a buzz coming from the inverter board. I have replaced both inverter boards and the same problems exisis .


I just changed out the invertor boards and mine was fixed. I had the same problem. Im not a TV repair man but replace the board thats buzzing and it will work again.

Jun 23, 2012 | Polaroid 4226TLMB 42 in. LCD TV

2 Answers

My samsung LE40R74BD set works fine for about 10 mins then screen goes blank (black) . It would appear there is no back lighting. I have visually checked the psu for blown capacitors but all seem to be...


This does not seem to be a power supply issue but rather an issue with the backlight inverter board. When the screen goes black, take a flash light and focus it on the screen from a close distance and several angles. See if you notice a very faint image. Try changing the channels to make it more noticeable. Try it and let me know

May 09, 2011 | Samsung LE40R73BD 40 in. HD-Ready LCD...

1 Answer

My HP dv6000 laptop screen goes black suddenly, without warning. It is solid black if on battery power; if I have it plugged in to power supply, it is black with flickering white lines.


Your inverter is failing. Under battery power there is not enough DC power for the inverter to convert to High voltage AC power and it goes black. Even under charging, there seems to be evidence that the inverter is failing because there it is unable to consistantly convert the needed power. Check the cables on the back of the display and change your inverter.

Nov 02, 2009 | Sony FD Trinitron WEGA KV-36HS420 36" TV

1 Answer

HP LC3040N Screen


I had the same thing happen, replaced the backlight inverter and it works fine. I got mine from http://www.lcdparts.net/LCDTVInverterdetail.aspx?InverterOriginal=V144-001MSS.

Feb 14, 2008 | HP LC3040N 30 in. HD-Ready LCD Television

1 Answer

Sound but no picture


I had the same thing happen, replaced the backlight inverter and it works fine. I got mine from http://www.lcdparts.net/LCDTVInverterdetail.aspx?InverterOriginal=V144-001MSS.

Nov 25, 2007 | HP LC3040N 30 in. HD-Ready LCD Television

1 Answer

HP LC3040N I have sound but no image


In my case, the backlight flashed on for less than a second, then went out. Turns out the backlight inverter was bad. I replaced it (got mine at http://www.lcdparts.net/LCDTVInverterdetail.aspx?InverterOriginal=V144-001MSS) and everything works fine.

Nov 12, 2007 | HP LC3040N 30 in. HD-Ready LCD Television

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