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HP Recommended
HP ProDesk 400 G4 Small Form Factor PC

Ii have a pro desk 400 g4. Never used found in closet. Trying to setup for first time as an extra work computer. Starts to a black screen saying boot device not found. Please install OS on HD, etc. tried various things can’t find a way to recover and install OS and start to be able to use computer. I do have an Ethernet plugged in with hopes to boot that way but so far no luck. Please help.

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