Owen Grover, a volunteer at the museum who currently helps maintain the cluster of BBC Micro machines, said they held up well despite being more than 30 years old. The BBC Micro was "pretty robust", he said, because it was designed to be used in classrooms. This meant that refurbishing machines for use in the hands-on exhibit was usually fairly straightforward. "The main problem we need to sort out is the power supply," he said. "There are two capacitors that dry out and if we do not replace them they tend to explode and stink the place out. So we change them as a matter of course." General maintenance on the machines includes replacing keys that stick and the occasional component that fails. Thankfully, he said, there were few custom-built components in the machine so getting spares is easy. Harder-to-obtain parts are cannibalised from broken or faulty machines the museum has in its stores.
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