User manuals are quite easy to acquire free from the manufacturer. Service manuals are generally not available. Google the particular thing you need to do (Ex:
brand/model replace hard drive. If there is a repair issue you will need to Google the symptoms, then the procedure for fixing, and finally will need the knowledge/skill/tools to follow the procedure.
I’m happy to help further over the phone at
https://www.6ya.com/expert/donald_f2ed37026a3ac881
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