Hello all, I have been trying to troubleshoot a smps board in a LED TV that would not turn on. There seem to be standby voltage as there is a red light blinking when the power button is switched on but just no sound or display. According to the service manual there should be a 5.8V standby voltage but when I checked it with DMM, the voltage reads 6.15V. Could this 0.35 voltage difference cause the LED TV not to turn on? Or such difference should be fine.
The 3 fuses are all okay and I have checked the various diodes using DMM diode modes and they all seems okay as well. Also there are no physical signs of any capacitors or resistors blown or enlarged.
Does anyone knows what would be the likely cause of the problem? I have attached a schematic of the power supply board for your reference. Thank you for any suggestions!
The 3 fuses are all okay and I have checked the various diodes using DMM diode modes and they all seems okay as well. Also there are no physical signs of any capacitors or resistors blown or enlarged.
Does anyone knows what would be the likely cause of the problem? I have attached a schematic of the power supply board for your reference. Thank you for any suggestions!
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