On the door, repair a Samsung LA46S81B LCD TV, the red light is on, and the remote control button does not respond. Disassemble the machine to measure 5V normal, test the power output 5.4V 12V and 13V no voltage, POWER ON / OFF voltage is 0V, the motherboard did not send power to the control voltage! The remote control and the button terminal voltage are normal, it is suspected to be a motherboard problem! Tell the user that one of the motherboard and the power board is broken, and the motherboard and power board are removed at an approximate price.
After returning to the store, I checked the motherboard and found no problems. In the first step, the software was tested after the simple first software. And the remote control and the buttons are not responding, so I am ready to brush the data first! VGA connected to the programmer can not read online, good board can be read online! I had to remove the iron cover and blow down the MX25L1605 memory. I first copied the original data and then wrote the same model data. On the power of the machine, I heard the relay on the power board screaming! At this point, the red light starts to flash and then off, and then the POWER ON/OFF voltage is measured to be 1.9V, and the power supply voltage output is normal! After the quotation, the door-to-door TV repair is again!
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