I have a HP 54201a . When I turn on the device , It shows two alarms that I marked in picture.
What are they and how can I fix them ? (Errors 313 and 330)
The scope probably needs repair. Unless you want to try it yourself, it's probably unrepairable. It was discintinued by HP in around 1991, and went out of support in 1996.
The Service Manual is available here:
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