I have a sharp 60LE600U when first plugged in I have a standby light the back lights come on and go off and then the standby light goes out. I have changed out the power supply board but still have the same problem. What could be causing this. Thank you for your help.
From the past history of Hisense brands of TV's the power board very seldom gives issues, they build them quite well, the only way to troubleshoot this issue is with a multimeter, look for the power on pin on the power supply connector going to the main board, you need to see about 3.5 vdc there when you turn the set on, I think you will see the voltage there for a few seconds then drop to almost 0, if you find this it's the eeprom that's lost it's data, this IC is located on the main board, there are 2 fixes, one is to replace the IC the other is replace the board. The chip costs under $20 but it's somewhat difficult to replace. Here is the listing for the IC https://www.shopjimmy.com/sharp-dkeymf905fm04-kf905-qpwbxf905wjzz-main-board-loc-ic8401-eeprom-only/
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