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Toshiba TV, sound works but no picture I have a Toshiba 49L621U. It was made in September 2016. When I turn it on, I see “ Toshiba” in big bright red letters (normal startup image) than the TV goes black. The sound works and I did the flashlight test and I see a very very dim picture when I get up close. Can anyone tell me what part I need to replace and what the part number is? Thanks in advance.

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Same issue here. I kept plugging in the TV and it would flash the logo and go black. I disconnected the LED line from the power board, plugged the TV back in and the LED's all lite up and got great picture. Turned it off and on a few times with the power switch with no problem. Left it alone about an hour, came back, got the same symptoms all over again, Flash then nothing.

I changed out the Power Supply board....same issue, Flash of logo and black screen. Probably going to heave ho the set.

Posted on Oct 05, 2019

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6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 413 Answers

SOURCE: Toshiba Sat A75-SP231, Display too bright no contrast

There is a brightness setting on your keyboard on ours it is Fn F6 to turn down the brightness. Just look for a sille "sun" symbol with a downward triangle symbalizing down. Try this and get back to me if it does not fix the problem we can try something else

Posted on Jan 13, 2009

4L60B4R1UM

  • 133 Answers

SOURCE: Flat line on Toshiba tube tv

It could be the vertical output IC, but there may be other possible causes which include:

- bad solder contacts on deflection yoke connectors or dirty connector contacts (on the circuit board and / or on the picture tube neck)

- bad solder contacts on the vertical output IC or associated components (check for little cracks in the solder around the pins, these are so called "cold" or bad / broken contacts)

- power loss to the vertical output IC - check for any burned resistors or other components around that IC, assuming you know which one it is - see which ICs are connected to the wires going to the deflection yokes (coils) on the picture tube neck and check them well.

You need to resolder any bad contacts, clean any dirty pins on the connectors and replace any burnt out components (assuming you can still determine the type or value of the component).

Since you mentioned the problem occurs once in a while, this means that the IC probably fails when it warms up, which can often happen if there are loose connections or bad solder contacts.

Anyway, it could turn out to be a faulty IC, i just suggested a few other things that can be fixed quite easily, and possibly without the need to replace any of the components.

regards

3rq8 (Triarcuate)

Posted on Sep 10, 2009

Jim Krause

  • 1779 Answers

SOURCE: 47inch toshiba lcd tv (HL167) black picture, but

Best to replace both at the same time . Yes they are easy if you can find the parts.

Posted on Dec 15, 2009

budmrtn

Bud Martin

  • 11361 Answers

SOURCE: Toshiba 22LV505 TV-DVD:

Check the DC filter caps in the power supply first. Check the 24vdc (or 18vdc for this 22" model) to see if it goes away when the screen goes black.
There are main AC fuse, backlight inverter fuses, T-CON fuses.
If you are going to DIY and have proper tools and know safety precaution then please read on:

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

http://s807.photobucket.com/home/budm/allalbums

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

Parts: www.shopjimmy.com

Posted on Jul 08, 2010

bulbguy

John Reilly

  • 37 Answers

SOURCE: Red power light and buzzing sound with red lamp light.

If the lamp does not light at all, it is probably a bad lamp. The buzzing may be the ballast trying to start the lamp or a problem with the power supply. Check the lamp and see if the arc tube is broken. If its a new lamp, you should be under warranty. I have the manual if you want to go to me site at allprojectorlamps.com. Just send you email to me attention Bulb Guy

Posted on Aug 17, 2010

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