HP Dc7900 Service Reference Guide: HP Compaq dc7900 Business PC - Page 286
Appendix E, System Board and Riser Board Reference Designators, Double-stacked parallel port
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J42 J50 J51 J52 J53 J54 J55 J64 J65 J66 J67 J68 J69 J70 J71 J72 J73 J74 J75 J76 J77 J78 J80 J81 J82 J83 J101 J103 J105 J9020-J9029 J9030-J9034 JP49/E49 L1 L2 PCI Express x4 graphics slot First parallel port Second parallel port Double-stacked parallel port, Top = Port B, Bottom = Port A Parallel port over single Serial Port Parallel port over Serial Port and Video Port Parallel port over dual VGA ports Display port connector DVI connector Keyboard connector, PS/2 (Closest to power supply) Mouse connector, PS/2 Stacked mouse (Top)/keyboard (Bottom) connector Video connector, VGA Primary single USB connector Secondary single USB port Microphone jack Line-in jack Line-out jack Headphone jack Volume control Double-stacked headphone (Bottom)/microphone (Top) connector Double-stacked line-in (Top)/line-out (Bottom) connector Stacked serial/audio connector Primary double-stack USB, Top = Port 2, Bottom = Port 1 Secondary double-stack USB, Top = Port 4, Bottom = Port 3 Triple-stacked audio jack (line in, line out/headphone, microphone) Security board connector - for security card DC input power PCI Express MiniCard PCI slots on riser card PCI express slots on riser card Clear password header/jumper USB front port choke (1st) USB rear port choke (1st) 274 Appendix E System Board and Riser Board Reference Designators