Which of the following are the MOST probable root causes for the given failure?

A technician replaced a broken LED screen on a mobile computer. The operating system can be seen perfectly on screen, but the touch screen is non-responsive.

Which of the following are the MOST probable root causes for the given failure? (Choose three.)
A . The hardware replacement used is a non-touch-screen.
B . The touch screen must be calibrated after a replacement.
C . The digitizer cable is not seated properly on the motherboard.
D . The new touch-screen drivers must be installed.
E . The replacement part is dead-on-arrival.
F . The LCD panel firmware must be updated.
G . The grounding screws are not securely attached.

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Answer: B ,C,D