Toshiba LED screen problems

[jwbradford]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

 

[Ciddpoptart]

Hi I have a toshiba 50l4300u led tv....is it the same pins? i tried looking and couldnt find them...could you direct me a service manual? my tv did this 2 months after he warranty expired. THIS IS A CRIME. 1000 BUCKS FOR THE THING. Any help
would be greatly appreciated. i get sound and the pic comes on for a sec and then blank. i have an image but no backlight

It's the led strip very common problem with led TVs, it's hard to find a place that will sell them I found a place in Romania that had my led strips for sale could not find anywhere in England that sold mine

 

[Jeff_pepin]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

locate de T-CON board a board with 2 ribbon cable that get to lcd pannel and another cable that comming from digital board of tv.,the T-CON pcb is usualy located in middle top or middle down of the back of screen , after located T-CON board and removed it , locate a surfacemounted fuse usualy next of input pin that feed power on T-CON board it maybe be marked 12V or 24V 1,5A or not , , on 90% of times this fuse get open because spike of power comming from used powersupply of tv , usualy badcaps cause instability and are no more able to make a smooth switch on. ripple on power on smack parts and eventualy it will cause a fuse to get partialy open .. good luck note ,, this fuse look pretty close to a surface mounted resistor , but insead marked as 101 ok any kind of letter its comonly marked as UC or Some letters are stamped insead of numeric value ,

 

[BCB67]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

 

[BCB67]

I also have two Toshiba TV's model 46l5200u1. Both are doing the same thing. I purchased a back light inverted and thought I had one fixed, only to have it do the same thing after a few hours. I've done some research, and found that there are many people out there having the same problem. I filed a report with Consumer Affairs. Looks like there may be a class action lawsuit with Toshiba with several models. 46l5200u1 was listed as one of them. The problem seems to be a undersized led strip that overheats. Found a replacement, but the cost was almost $300 just for the part. Changing it looks to be a pain as well. Good luck.

 

[Raymond_3]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

I had same problem it turns out to be the led's it is a very common problem with led TVs and your be very hard push to find a place that does them I found a place in Romani that done my led strip for my tv but that took days of looking online

It would be nice if you posted your source for the LED strip in Romani.

 

[adaukes]

The Main Processor board is commanding the LCD back light to turn off via the DIM control line. With a voltmeter check the voltage on the DIM line pin 15 on the power supply board connector of the cable going to the main control board. The pins are labeled. The DIM line drops from 3.4 vdc to zero when the screen blanks. The BLON pin 16 stays at 3.4 vdc. Turn the set off and jumper a wire between pins 15 DIM, and 16 BLON, shorting them together. Now turn the set on and the back light will stay on. This connection inhibits the main control board from blanking the screen upon loss of signal.

Thus the main control board is bad. Flashing the firmware does not help.

On the LED Driver board with the set on, screen off, pin 1 on the connector to the screen is 10.20 vdc. When screen is lit the voltage is 101 vdc or more.

THIS WORKS. Thanks

 

[tfollenicole]

The Main Processor board is commanding the LCD back light to turn off via the DIM control line. With a voltmeter check the voltage on the DIM line pin 15 on the power supply board connector of the cable going to the main control board. The pins are labeled. The DIM line drops from 3.4 vdc to zero when the screen blanks. The BLON pin 16 stays at 3.4 vdc. Turn the set off and jumper a wire between pins 15 DIM, and 16 BLON, shorting them together. Now turn the set on and the back light will stay on. This connection inhibits the main control board from blanking the screen upon loss of signal.

Thus the main control board is bad. Flashing the firmware does not help.

On the LED Driver board with the set on, screen off, pin 1 on the connector to the screen is 10.20 vdc. When screen is lit the voltage is 101 vdc or more.

But what if, just like me, you have no clue as to how to do all this (what does "jumper a wire" even mean?), what do you do? Find a repair shop and show them your answer maybe?

 

[Lady Veedever]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

We have the same problem as well, we also have toshiba led tv. It happened just last week.. May i know if u already find a solution to fix it? If so may i know it how? Thank you! [don't post your email address on a public forum]

 

[tfollenicole]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

We have the same problem as well, we also have toshiba led tv. It happened just last week.. May i know if u already find a solution to fix it? If so may i know it how? Thank you! [don't post your email address on a public forum]

 

[tfollenicole]

I tried all that was suggested above and nothing worked. Would have cost me $1400 to change the broken part. $1000 down the drain. Was told Toshiba pulled out of the market. What a waste.

 

[Raymond_3]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

We have the same problem as well, we also have toshiba led tv. It happened just last week.. May i know if u already find a solution to fix it? If so may i know it how? Thank you! [don't post your email address on a public forum]

Hi,

I found a "temporary" solution, but have may have to dig to find it. It involves opening up the TV and unhooking a wire that feeds a signal to to main board to shut down the screen. This is what I did "shrike0064 said:
The Main Processor board is commanding the LCD back light to turn off via the DIM control line. With a voltmeter check the voltage on the DIM line pin 15 on the power supply board connector of the cable going to the main control board. The pins are labeled. The DIM line drops from 3.4 vdc to zero when the screen blanks. The BLON pin 16 stays at 3.4 vdc. Turn the set off and jumper a wire between pins 15 DIM, and 16 BLON, shorting them together. Now turn the set on and the back light will stay on. This connection inhibits the main control board from blanking the screen upon loss of signal" This was posted by shrike0064, and so far it has worked. But it may be only a temporary solution because one of the led strips are going bad and will have to be replaced to make your tv whole. Hope this helps.

 

[John_340]

I have 2 Toshiba LED TV's, both are model #: 46L5200U1, that are having identical issues. The screen will begin to flicker, and then cut out entirely, but the sound remains on. Sometimes after an hour or two, but usually after only a few minutes of use. It happens on all inputs, with or without a source plugged in. Turning off the set, then back on will restore the picture, but only for a few minutes. They started doing this within days of each other. I have been unable to find any references to this online, despite having identical units exhibiting identical behaviors. The sets had been installed in a restaurant, each had a cable box run to it via hdmi cable. Has anyone seen this issue before? Any insight would be appreciated.
Thanks

We have the same problem as well, we also have toshiba led tv. It happened just last week.. May i know if u already find a solution to fix it? If so may i know it how? Thank you! [don't post your email address on a public forum]

Hi,

I found a "temporary" solution, but have may have to dig to find it. It involves opening up the TV and unhooking a wire that feeds a signal to to main board to shut down the screen. This is what I did "shrike0064 said:
The Main Processor board is commanding the LCD back light to turn off via the DIM control line. With a voltmeter check the voltage on the DIM line pin 15 on the power supply board connector of the cable going to the main control board. The pins are labeled. The DIM line drops from 3.4 vdc to zero when the screen blanks. The BLON pin 16 stays at 3.4 vdc. Turn the set off and jumper a wire between pins 15 DIM, and 16 BLON, shorting them together. Now turn the set on and the back light will stay on. This connection inhibits the main control board from blanking the screen upon loss of signal" This was posted by shrike0064, and so far it has worked. But it may be only a temporary solution because one of the led strips are going bad and will have to be replaced to make your tv whole. Hope this helps.

 

[John_340]

I have the same tv for last 3 1/2 years and same problem started last night and wondering if there's a fix for the problem ?

 

[Jie SC]

I also have this problem..just after 4 months after out of warranty. Btw, i'm Mizi from Malaysia and had Toshiba 39L4300VM. I bought on December 2013. Last night the tv was OK and i can watch tv like usual but after i come back from work this morning, it doesn't work. I thought it was because i use hdmi cable to connect to my laptop but it's not.

After i had research at Internet, i found there is many people had this problem. My tv has power but no image. I found how to troubleshoot on YouTube (https/goo.gl/L9K9ZJ) and found that it must be my tv main board was problem. My TV has backlight but just no image was appears.

I also call Toshiba Call Centre (Malaysia) locate at Penang and it was recommended to ask technician to come to my house to check it with it cost RM75 just for come and check. I ask the call centre there is no ways to reset this TV? and he said there is no reset button but after i look again be careful, i find the reset button on the tv. I try to reset but nothing changed.

After i troubleshoot at my own, i think it was main board problems but i think i will also wait for the technician to come to my house to check it again on Tuesday (26 April 2016). I just wanna know how much the cost to replace the new main board. If it was more than RM500, i think i will buy the new TV since currently there is promotions on GEMFIVE.

I also try the solutions from "shrike0064" but i'm not done since i'm bad at the electronic boards. Haha..Btw, thanks for the solutions.

 

[Munira_1]

I also have this problem..just after 4 months after out of warranty. Btw, i'm Mizi from Malaysia and had Toshiba 39L4300VM. I bought on December 2013. Last night the tv was OK and i can watch tv like usual but after i come back from work this morning, it doesn't work. I thought it was because i use hdmi cable to connect to my laptop but it's not.

After i had research at Internet, i found there is many people had this problem. My tv has power but no image. I found how to troubleshoot on YouTube (https/goo.gl/L9K9ZJ) and found that it must be my tv main board was problem. My TV has backlight but just no image was appears.

I also call Toshiba Call Centre (Malaysia) locate at Penang and it was recommended to ask technician to come to my house to check it with it cost RM75 just for come and check. I ask the call centre there is no ways to reset this TV? and he said there is no reset button but after i look again be careful, i find the reset button on the tv. I try to reset but nothing changed.

After i troubleshoot at my own, i think it was main board problems but i think i will also wait for the technician to come to my house to check it again on Tuesday (26 April 2016). I just wanna know how much the cost to replace the new main board. If it was more than RM500, i think i will buy the new TV since currently there is promotions on GEMFIVE.

I also try the solutions from "shrike0064" but i'm not done since i'm bad at the electronic boards. Haha..Btw, thanks for the solutions.

hai, I have no solution to offer, but am also facing the same problem.. am interested in knowing your tv outcome, sir.. repair or replace? thanks in advance

 

[speed3aller]

I had a problem with my Toshiba TV flashing black screen. Go into the picture settings and turn the backlight down. This has completely solved my issue

 

[Kevinjo]

I have found if you only use HDMI1, set will work fine. If you astray any other plug... Blink!!

 

[Riley_14]

I removed the yelow wire from pin 15. It was conected from main board to power suply board. Now it works fine, but no 3D.

Pin 15 controls the (DIM).

 

[Sercole de la Verendrye]

To give everyone a heads up, in case they are thinking of buying a Toshiba, I bought a 55" 1080p LED TV (55L310U) from Best Buy less than a week ago and started having that same issue - screen goes black and no sound . After 30 sec or so the audio comes back. Thank goodness this happened early so I can bring it back. Costco here I come.

 

[Mark alt]

I removed the yelow wire from pin 15. It was conected from main board to power suply board. Now it works fine, but no 3D.

Pin 15 controls the (DIM).

To give everyone a heads up, in case they are thinking of buying a Toshiba, I bought a 55" 1080p LED TV (55L310U) from Best Buy less than a week ago and started having that same issue - screen goes black and no sound . After 30 sec or so the audio comes back. Thank goodness this happened early so I can bring it back. Costco here I come.

Riley did u just cut the wire? I don't see where pin 15 is labeled. I see 16 labeled. I just assume 15 and 16 are connected with the 10 or so other wires. Any insight would be great.