The TV originally had a classic dead backlight. The toshiba logo flashed, and then the screen went black. A flashlight revealed that the LCD panel was functional. Just that the backlight was out. After replacing the backlight with a new one on ShopJimmy, the backlight now stays on. But there is no Toshiba logo nor any picture visable. Audio from the TV can still be heard.
T'Con board fault. Check and replace it. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Testimonial: "But the T'Con board worked prior to replacing the backlight. Do you think we shorted it out? Also which specific post are you referring to?"
It is difficult to sort out the posts describing the T'Con board fault by that site, as it contains more than 5000 posts so far, and is daily updating by at least one post. Just type in "T Con board fault" in the search box at the top right of the home page to get gathered related posts. It will be the easiest way.
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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.
SOURCE: How do you change a backlight inverter board on a Toshiba 46L5200U TV?
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
SOURCE: How do I fix my Toshiba LCD TV that no picture or audio?
Fault at its main digital 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.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here. ..
Testimonial: "Your link have no past posts for this model. I do my own servicing since 1966, and worked with RCA radios and TVs with vacuum tubes, so all I need was a guide to confirm that the main board could be bad. BTW, how can I test the backlights? They have two signals "Dimmer" and "Inverter" which are always at zero volts. Which one will turn the backlight inverter on?"
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