I've found an invisible machine from the 23rd century, but it's not
working.
How can I repair it?
That requires specific test equipment:
Revisible Variable Intensity UV/IR Worklight: $2,399 (Availablity
50 years)
Revisible Digital Voltmeter (w/sub-micro probes): $11,999
Revisible Digital Oscilloscope and Locic Analyzer: $239,999
[snip]
More information available at
www.revisible.com