Hi,
The problem is the power supply board most likely overheated (look at the power supply board, I will bet that it looks tanish and brown in certain parts), and either a diode failed, or the PWM Switching chip (or mosfet) failed. I have fixed a ton of these, however sometimes these cannot be fixed due to a design flaw. The part about these units that I dont like is that there is a chip on the front faceplate that switches power from the SMPS to the AV Board. If this chip fails, you got yourself a 12 lb paperweight, that chip cant be replaced unless you get another known working unit and swap faceplate boards.
Just thought I would share some info as I have a ton of time invested into this unit over the past 4 years.
The problem is the power supply board most likely overheated (look at the power supply board, I will bet that it looks tanish and brown in certain parts), and either a diode failed, or the PWM Switching chip (or mosfet) failed. I have fixed a ton of these, however sometimes these cannot be fixed due to a design flaw. The part about these units that I dont like is that there is a chip on the front faceplate that switches power from the SMPS to the AV Board. If this chip fails, you got yourself a 12 lb paperweight, that chip cant be replaced unless you get another known working unit and swap faceplate boards.
Just thought I would share some info as I have a ton of time invested into this unit over the past 4 years.