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TOSHIBA 32bv500b screen stops working sound works fine

Screen works fine for 20 mins then stops working. picture dissappears diagonally from bottom to top corner leaving a grey screen (backlight appears to be working). Sound works fine. Have read Bud Martins troubleshooting guide (Kudos to bud for a great guide) which suggests a faulty T-Con. Trouble is i cant find a T-con tv seems to have power board connecting to inverter and logig / input board but no other boards visible. Any ideas? Power board: http://www.lcd-plasma-parts.co.uk/index.php?route=product/product&filter_name=17PW26-4&product_id=2967

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  • Toshiba Master
  • 933 Answers

I'm having a hard time finding any parts for the set besides the power supply board. The T-Con is usually located top center on the back of the LCD panel. It will be under a metal cover. Sometimes, the t-con circuitry is built onto the main board. If this is the case with yours, you will have to order the main board. Feel free to send me a pic of the back of your set.

info@back2lifeelectronics.com

Posted on Jan 06, 2013

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: got a new T-con but no luck

is your back light constantly on when you are not changing channels.if so replace the main board. can you see a menu if you hit the menu button ? that is generated by your main board..... replacing the t-con will only correct vertical lines in the pic.

Posted on Feb 28, 2009

westytech
  • 120 Answers

SOURCE: Westinghouse lvm-47w1 picture goes dim

Hello, I can tell you from experience that this is an inverter issue. Both the master and the slave have several transformers and sometimes you can't tell if they are damaged or not. I would recommend testing the leads from the inverters to make sure which one of the two is the one causing the dim picture.

Posted on Apr 15, 2010

budmrtn
  • 11361 Answers

SOURCE: I have an insignia NS-LCD37HD that has backlight

Chec to see if you are getting 12vdc at the T-CON board power input pin first.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

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

Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums

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

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

Posted on Oct 04, 2010

Testimonial: "So far so good! Almost got it figured out. Thanks!"

ssemul
  • 202 Answers

SOURCE: What are the parts mounted on top of the LCD

There is T.con board use as a output for LCD panel.Input come from Main board. One power supply board and invertor board for back light.Thats all have in side LCD TV.

Posted on Nov 04, 2010

  • 8457 Answers

SOURCE: My toshiba 42" REGZA 42RV535U

U have sound but no picture?Picture does flashes a few sec?Yes,than those 2 long LCD inverter boards are dead.Tries websites like Shopjimmy.com,Ebay.com to buy those 2 long LCD inverter boards for the replacement.

Posted on Jan 13, 2011

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