ktnrecs

hi i have a mini disc with EL Light display. The thing is that after six months without use when i tried to use it the display went dark, even with AC adapter. The display works (i can see only in deep darkness). Last time i used it, the display was perfect. And that is a device in NM conditions. Hope you can help me to fix this issue.

i bought nine last week. Sealed with the same package than the right one, but with grey discs like left one...