Fixing Eppendorf FemtoJet compressor

Hello all! Microscopy accessory question:

I’m evaluating some older equipment that’s lying around and have two Eppendorf FemtoJet compressors that each give the error “Working pressure leak” during the Self Test. Has anyone repaired this themselves or had it repaired? Trying to determine if they are worth getting up and running or are effectively scrap metal. TIA! --Wendy