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Corey EvansJul 27, 2025
Why does the light fail to operate on my National 156?
- GGregory SantiagoJul 27, 2025
The light may fail to operate on your National Microscope due to several reasons. It could be that the outlet is inoperative, requiring a qualified service technician to repair it. Alternatively, the AC power cord might not be properly connected, so ensure it's plugged into the outlet. A burned-out lamp or a blown fuse (0.5 amp time delay 5mm dia. X 20mm long) could also be the cause, requiring replacement.
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