The very best thing you can do is sometimes the simplest. So... Uninstall the printer completely. Leave for 20 minutes. Re-install printer and all should be well. How do I know this? Years of experience and many printers!
I think this is the best idea. You may see any obvious signs of salt residual. But ultimately I'm afraid it may have to go to the shop if all else fails. Good luck buddy.
As you have no power lights and the washer will not turn on, please check that you have the machine turned on at the power point. If it is turned on, check your fuse box and correct any switch as necessary.