That right hand panel is a separate circuit board - one of four panel boards (the left hand panel on two boards, the matrix and the right hand panel). If nothing else, the fault is most likely pretty well isolated. It could be the power to that board not getting through, or a fault on the board itself. Does the rest of the synth work and produce sound? With some luck it could be easily fixable, like e.g. a bad connection or replacing just that one board.
If your synth is still covered by warranty, I recommend having it serviced. If it's out of warranty and you're comfortable servicing your own gear, you could open it up and check that the connections are good before sending it in (it's connected by three small bridge boards, one for power and two for signals), or even getting a new right hand panel board if Arturia provides an option for self servicing.
