Hi, Need help on a 50" Toshiba L2300U series LED TV. Less than 3 years old and the LED back light just went out. Has sound and picture (with a flashlight). I got the front bezel and back panel off (what a pain!). I poked around the power supply board near the LED power connector with an ohmmeter and found 2 shorted Schottky barrier diodes and a shorted N channel Mosfet (I have some experience in electronic circuitry but not with LED TV's). I could not get the exact p/n replacements but replaced them with components that are higher spec in volts and current.
Unfortunately, I did not take any voltage measurements before I replaced the 3 bad components. After plugging in the power supply board, the unit would not power up with the remote or the power button on the main board. I took power supply voltage readings at the connector and they are as shown below. I am not sure what to do next to get the TV to power on to see if replacing those 3 parts helped. When the front bezel was pryed off, the IR sensor and LED indicator connector just ripped off. It does not look damaged. I have not tested continuity of the wires at the IR sensor or LED indicator but will do so. Any help appreciated.
Unfortunately, I did not take any voltage measurements before I replaced the 3 bad components. After plugging in the power supply board, the unit would not power up with the remote or the power button on the main board. I took power supply voltage readings at the connector and they are as shown below. I am not sure what to do next to get the TV to power on to see if replacing those 3 parts helped. When the front bezel was pryed off, the IR sensor and LED indicator connector just ripped off. It does not look damaged. I have not tested continuity of the wires at the IR sensor or LED indicator but will do so. Any help appreciated.
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