Do you know the environmental condition of the storage area? If conditioned were 70 degrees +or - a bit. If so, I would do a few things first. Open the cases and perform a visual inspection of each device. If the capacitors are swollen and leaking material, this would be bad. Now, if you only find dust and age related debris, plugged that puppy in and rock.
None of the above is based on a Electrical Engineering Degree, just years of "Get It Done" and are you kidding "it Worked".
None of the above is based on a Electrical Engineering Degree, just years of "Get It Done" and are you kidding "it Worked".