HP LH4r HP Netserver Service Handbook, Volume 2 - Mid - Page 161

System Board Connectors Connector IDE disk drive cable Keyboard Video Serial SCSI port B PCI slots Fan Power supply ECC memory slots Power supply on Hard Disk Activity Number J9F1 J9A1 J7A1 J8A1 J0G2 P2-2, P2-1 P1-1, P1-2, P1-3 J1J1, J4J3 PS3 (J9B2) PS4 ((J9C2 PS1-PS2 (J9O2) MEM 1 - J9J1 MEM 2 - J8J1 J9E1 J1J2, J4J2 Connector Flexible disk drive Mouse Parallel SCSI port A Battery (Clock Module) EISA/ISA slots Control panel Processor board slots I2C 1 I2C 2 Remote power supply Number J9F2 J9A1 J7A1 J0J1 U7D1 M6, M5, M4, M3, M2, M1 J9H1 CPU 1 - J7J1 CPU 2 - J6J1 J0J3 J0J2 J1 System Switches and Jumpers Switch/ Jumper J9B1 J9C1 J9C3 J7D2 J4H1 J6A1 J7C1 Description Default Floppy Drive 1 Floppy Drive 0 Power Control - Disables or enables real-time clock power control. This jumper enables power supply maintenance voltage control using the real-time clock. Boot Block (BIOS Recovery) - The flash memory contains a protected area that cannot be corrupted. Code in this area is used to boot the server from drive A if the BIOS gets corrupted during a BIOS update procedure. Enable this switch to use boot block recovery, then redo the BIOS update. TDV Video Sleep - Determines which I/O port the onboard Cirrus Logic super VGA controller uses for its internal AT mode setup port. Program Boot Block - lets a qualified service technician update the boot block. Not used Not used Disabled Disabled Not used REG 3C3 Disabled 153