Toshiba 50l1350uc no power

[benq1]

Does anyone know how to open the Toshiba 50l1350uc? I have removed all the screws from the back but I am unable to open it.

Thanks,
Don

[Alastair E]

Re: Toshiba 50l1350uc no power

Some sets have strong clips in the plastic that hold the case in addition to the screws....

Make sure ALL SCREWS are removed--especially from around input sockets etc....

[benq1]

Re: Toshiba 50l1350uc no power

Thanks

There were clips along the bottom that I missed. So far no bad caps but I have only done a visual.

[benq1]

Re: Toshiba 50l1350uc no power

Does anyone know what the voltage for the LED panel should be? There is writing on the board saying VLED 111v 800ma DC but when I measured the voltage going to the panel it was only 79 volts. anyone know what it should be.

[budm]

Re: Toshiba 50l1350uc no power

Pictures of the LED driver board, other boards and the backside of the TV? Hard to troubleshoot without pictures.
https://www.badcaps.net/forum/showthread.php?t=39740
There should be filter caps after the boosted voltage converter circuit for driving LED strings that you can measure the DC voltage at.
The LEDs are connected to the current sink MOSFETs which is PWM controlled, your meter will not show correct DC Voltage.
What is the TV not doing?

[benq1]

Re: Toshiba 50l1350uc no power

The problem with the TV is the power light comes on but nothing else. See attached photo's These are the only 2 boards.

[benq1]

Re: Toshiba 50l1350uc no power

Sorry missed Tcon

[budm]

Re: Toshiba 50l1350uc no power

https://www.badcaps.net/forum/attach...6&d=1415136634
OK, there are two filter brown filter caps next to the LED connector. Can you read the Voltage rating on the caps? You should test the Voltage right at the two legs of the caps when the power switch is activated.
So you do not even see the backlights come on at all for seconds?
BTW, as you can see here, the board shows 255V for the Voltage for the LEDs, but the filter caps is only 200VDC rating, so do not trust what is printed on the board since same board may be stuffed with different parts for other models.
Sine the LEDS are PWM the voltage readings will not show anything closed to 200V.
https://www.badcaps.net/forum/showth...414#post498414

Can we see good bright and clear pictures of the bottom side of the power supply board?

[benq1]

Re: Toshiba 50l1350uc no power

Sorry for the delay.
Voltage rating on the caps is 160 volts.The voltage on the caps is 78.7v and 78.9v.
The backlights do not come on at all. Here are 2 pics.