Question about Toshiba 50L4300U 50" 1080p LED-LCD TV - 16:9 - HDTV 1080p 1920 x 1080 - Audyssey EQ, Audyssey ABX, Audyssey Dynamic Volume - 4 x HDMI - USB - Ethernet - Wi-Fi - PC Streaming - Internet Access - Media Player
I have picture but no sound
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Posted on Jan 02, 2017
All plasma an lcd tvs have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables. If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen. Many times reseating the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They can sometimes be fixed, but it is a pain. An yes I have done it, and the bar is gone. The same will happen if the chip that outputs to that area opens. The connectors are the first place to look paying close attention to the cable, they are extremely delicate so great care must be taken if you decide to tinker with em, the usually have lift locks that release them, but it is very easy to wreck em.
Posted on Aug 03, 2010
It may have taken out the surge suppresor devices and the main fuse in the TV power supply, that will be the first place to look.
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:
Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Please post back what you find.
Posted on Oct 22, 2010
Yes if there is no clicking, then the power supply is usually faulty. However its difficult to tell if it has affected any other boards(like the main board) with out testing it. I would suggest that you take the assistance of a tech, have him test it to determine if its just power. If yes then you can get a new power board and replace it. Otherwise it may be wiser just to get a new tv. You can get a 26 inch tv for around 350-400$ now.
Posted on Nov 02, 2010
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