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Please check mechanical positions of CI module.

Detect ports should be low. If it is not low please check CI connector pins, CI module pins 
and 3V3_VCC on MB62.

Problem: LED blinking, no other operation

This problem indicates a short on Vcc voltages. Protect pin should be logic high while 
normal operation. When there is a short circuit protect pin will be logic low. If you detect 
logic low on protect pin, unplug the TV set and control voltage points with a multimeter to 
find the shorted voltage to ground. 

Problem: LED or IR not working
Check LED card supply on MB62 chasis.

Problem: Keypad or Touchpad is not working

Check keypad supply and KEYBOARD pin on MB62.

Problem: USB is not working or no USB Detection.

Check USB Supply, It should be nearly 5V.