Mark Levinson No. 36 DAC,,,NEED HELP

i have the Mark Levinson No. 36 D/A Converter, but it not working,
"NO CODE" is displayed upon power-up. how to repair it? thanks!

jc12602-27-2018 3:01am

jc126 OP Details Discussions Posts This discussion Message User 3 posts 02-27-2018 at 08:18am Copy Comment URL Report Comment Edit Delete NO CODE" is displayed upon power-up.
jc126 OP Details Discussions Posts This discussion Message User 3 posts 02-28-2018 at 02:00am Copy Comment URL Report Comment Edit Delete gs5556 when it power-up just show "NO CODE" on the screen, and all the button not working. someone said it is locked.
jc126 OP Details Discussions Posts This discussion Message User 3 posts 02-28-2018 at 04:47am Copy Comment URL Report Comment Edit Delete how to unlock it?