The task of changing the chip is not "dangerous" but does need care.
You will need an anti-static mat and wrist strap particularly important if your AVANT is in a room with carpet and you are wearing leather shoes for example. You can destroy the chip and other components if you body has a built up a static charge, hence the need for an earthed wrist strap to immediate discharge any static before it becomes an issue.
The chip is contained within a small shielded box on the inside of the rear printed circuit board. The picture below shows the box with the earthed screen lit removed.
A plastic tool should be used to remove the old chip and carefully put the new chip in the socket noting the location of the corner cut off to ensure it goes in the correct way round.
For someone who has done the task before it will take them no more than 10 minutes including taking the back off the TV etc.