ELEKTRONIKA MK 61 display and keys dont work (Pictures)

[jebem]

(08-07-2015 06:45 PM)lechuck Wrote:  (...)the problem was solved by cleaning with isopropyl alcohol as you indicated and they have returned to work digits and damaged keys
Have a good one.

Glad to know that you manage to fix it.
Please keep posting your findings here on these Russian calculators.

And as TASP mentioned above, great care is needed to not destroy the plastics and labels from the keyboards when cleaning it.
On some calculators, even isopropyl alcohol can be dangerous.
Isopropyl alcohol is safe to clean the PCB (printed circuit board) and electronic parts only.
To clean the keyboard keys and face plates I usually use just warm water, a soft manual dishwashing detergent and a soft brush.