Sony KDL-48W657D (main board protect, green light steady at the same time red light s

[FMstatic]

Diagnose (panel problem)
- main board replaced- still no good
- panel board check all supply present and correct voltage
- hang flex ribbon main board to panel (error 5blink) but when connected again nonstop red blink no pose and green light steady
-SDA and SCL supply 3.3v panel board
-BL is good simulated
Guys help me any suggestion
Main board protect 12v shut off when connected to panel board

[FMstatic]

Re: Sony KDL-48W657D (main board protect, green light steady at the same time red lig

Main board replaced due to mcu BGA damage

[FMstatic]

Re: Sony KDL-48W657D (main board protect, green light steady at the same time red lig

Where do i get the panel board diagram?
How to bypass main board protect to panel to see the condition of panel appearance