Initially unbox the printer and place it near the table.Power on the printer and establish a connection with the system using a data cable.Make sure to switch on the printer.Now if drivers are installed then this will detect the printer automatically.Try to have some prints after the establishment of the connection. HP OfficeJet 5255 Printer Setup https://simplyassist.us/123-hp-com-setup-oj5255/

123.hp.com/setup oj5255 | 123.hp.com/setup oj5255 Setup &Installation - Simplyassist
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123.hp.com/setup oj5255 | 123.hp.com/setup oj5255 Setup &Installation - Simplyassist

If you want to setup your 123.hp.com/setup oj5255 you are at the right place of setup and installation .