Unfortunately, we cannot fix Nikomat series because electric parts are no longer available. Additionaly, Nikon FA, FM, FE, FE2, EM and others are not repairable because of electric parts difficulties.
An electric camera could get into a situation where its previously normal function would be unstable by removing a cover plate. Therefore, we cannot set to work on an electric camera without spare parts enough to bring it back into its original state.