Pentair fleck 5800 XTR2 won’t start (help!)

[Qutrit]

Hello,

I went away for three weeks (shut off water) and now that I’m back the screen of my softener controller is black abs won’t turn on. Power cycling does nothing to it.

Any idea what I can try? Thanks a lot in advance!

 

[Reach4]

Step 1 would be to check the powers supply.