Step 3: check the control panel for error messages, Step 4: check the paper, Step 5: check the software – HP LaserJet Pro 400 MFP M425 User Manual
Page 163: Step 6: test print functionality, Step 7: test copy functionality, Step 8: check the toner cartridge, Step 9: try sending a print job from a computer, Step 10: verify that the product is on the network
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