With the panels removed the machine can be turned on and operate as normal. Removing the panels helps with diagnosing water leaks and electrical issues.
At this point you can remove the side panels. On newer models there is a pop rivet holding the back of the side panels in place and will need a little more force to remove.
At this point you can remove the back panel and have access to the internal components of the A53 / A53 Mini / Mini Vivaldi / Vivaldi.