Toshiba 32DL933G Usb Firmware ( Yazılım ) isteği .

toshiba 32dl933g vestel 17Ips19-3 MAIN 17MB62-2.5 display LTA320AN12 I have this toshiba led tv that does not turn on the leds. The voltage on the mos is 19 volts. Sometimes they turn on then after turning off the tv no the backlight leds turn on. What can i check?