Table 10. System board jumpers and connectors(continued)
Item Connector Description
12. MEZZ1_FAB_C Mezzanine card connector
13. MEZZ2_FAB_B Mezzanine card connector
14 VFLASH Micro vFlash card connector
15 bNDC Network Daughter Card (NDC) connector
16 CPU1 Processor 1
17 CPU2 Processor 2
18 BATTERY System battery connector
System board jumper settings
For information on resetting the password jumper to disable a password, see Disabling a forgotten password.
Table 11. System board jumper settings
Jumper Setting Description
NVRAM_CLR
(default)
The BIOS configuration settings are retained at system boot.
The BIOS configuration settings are cleared at system boot.
PWRD_EN
(default)
The BIOS password feature is enabled.
The BIOS password feature is disabled. iDRAC local access is
unlocked at next AC power cycle. iDRAC password reset is
enabled in F2 iDRAC settings menu.
Disabling a forgotten password
The software security features of the PowerEdge M640 system include a system password and a setup password. The
password jumper enables these password features or disables them, and clears any password(s) currently in use.
Prerequisites
CAUTION:
Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that came with the product.
Steps
1. Turn off the system by using the operating system commands or the CMC.
2. Remove the system from the enclosure to access the jumpers.
3. Move the jumper on the system-board jumper from pins 2 and 3 to pins 1 and 2.
4. Install the system in the enclosure.
5. Turn on the system.
When the system is turned on, power indicator turns on to solid green. Allow the system to finish booting.
The existing passwords are not disabled (erased) until the system boots with the password jumper on pins 2 and 3. However,
before you assign a new system and/or setup password, you must reinstall the password jumper back to pins 1 and 2.
Jumpers and connectors
69
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