IBM 8651RM0 Hardware Maintenance Manual - Page 156

J6A1 Unprotect Protect 1 Boot Block 1 23 3. If the primary processor board blocks access to the jumper, remove it (see "Processor or Memory Board" on page 121). 4. Set the BIOS boot block jumper: a. To remove the write-protection from the BIOS boot block, move the jumper to pins 2 and 3. b. To set the write-protection on the BIOS boot block, move the jumper to pins 1 and 2 (factory default). 5. If you removed the primary processor board, install it. Video-Sleep-Register Address Setting (J6A2): The Video-Sleep-Register jumper determines which I/O port the SVGA controller uses for its internal AT mode setup port. The starting address of the default port is 03C3H (pins 1 and 2). When this jumper is set to pins 2 and 3, the Video-Sleep-Register address changes to 46E8H. If no keyboard activity occurs after a specified timeout period (1 to 128 minutes, as specified through the Setup program), the Video-Sleep-Register jumper blanks out the monitor screen. When this happens, you must enter a password to reactivate the monitor and keyboard. To change the location of the Video Sleep Register: 1. Power-off the server and peripheral devices and remove the top cover (see "Cover (Top)" on page 72). 2. Identify the Video-Sleep-Register jumper, J6A2. 46E8 3C3 1 Video Sleep 1 23 148 Netfinity Server HMM J6A2