Dell Precision 610 - Manual (Page 85)

Parallel one 25-pin connector (bidirectional)
SCSI one 68-pin Ultra/Wide SCSI connector
Video standard 15-pin DIN connector(s) on add-in graphics adapter
PS/2-style keyboard 6-pin mini-DIN connector
PS/2-compatible mouse 6-pin mini-DIN connector
NIC RJ45 connector
USB two USB-compliant 4-pin connectors
Audio line in 1/8-inch miniature audio jack
Audio line out 1/8-inch miniature audio jack
Audio microphone in 1/8-inch miniature audio jack
Internally accessible:
EIDE drive two 40-pin connectors on PCI local bus
Primary SCSI channel one 68-pin Ultra2/Wide SCSI connector
Secondary SCSI
channel one internal 50-pin Narrow SCSI connector; one external 68-pin Ultra/Wide SCSI connector
Diskette drive one 26-pin connector
CD-ROM drive audio
interface 4-pin connector
Wakeup On LAN 3-pin connector
Fan 3-pin connector
Control panel
connectors:
Thermal sensor 3-pin connector
Chassis intrusion 2-pin connector
Speaker 4-pin connector
Video
Video type AGP and PCI graphics adapters
Key Combinations
restarts (reboots) the system
or
starts System Setup program (during POST only while Dell logo screen is displayed)
Controls and Indicators
Reset control push button
Power control push button
Power indicator/sleep
mode indicator green LED (indicates power)
amber LED (indicates sleep mode)