3 slot on the chassis
Figure 82. Installing the LED control panel board—four cabled hard drive chassis
Next step
Follow the procedure listed in the After working inside your system section.
System board
A system board (also known as the motherboard) is the main printed circuit board in the system with dierent connectors used to connect 
dierent components or peripherals of the system. A system board provides the electrical connections to the components in the system to 
communicate.
Removing the system board
Prerequisites
CAUTION
: Many repairs may only be done by a certied 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 are shipped with your product.
NOTE: This is a Field Replaceable Unit (FRU). Removal and installation procedures must be performed only by Dell certied 
service technicians.
CAUTION: If you are using the Trusted Program Module (TPM) with an encryption key, you may be prompted to create a 
recovery key during program or System Setup. Be sure to create and safely store this recovery key. If you replace this system 
board, you must supply the recovery key when you restart your system or program before you can access the encrypted data on 
your hard drives.
CAUTION: Do not attempt to remove the TPM plug-in module from the system board. After the TPM plug-in module is installed, 
it is cryptographically bound to that specic system board. Any attempt to remove an installed TPM plug-in module breaks the 
cryptographic binding, and it cannot be re-installed or installed on another system board.
126 Installing and removing system components