5. Installing and Replacing Optional DevicesExpress5800/R320e-E4, R320e-M4, R320f-E4, R320f-M4 Maintenance Guide (VMware) 109Chapter 2 Configuring and Upgrading the System5. Installing and Replacing Optional DevicesThis section describes procedures to add/remove optional devices and replace failed components.Important NEC recommends that the installation or replacement be performed by amaintenance engineer (of an NEC-approved maintenance service agency) who isacquainted with this server and has expert knowledge on it. If you add or remove an optional device to or from the server or replace it byusing a procedure not shown in this chapter, or you install an unspecified part orcable, NEC will take no responsibility for any breakage of the server or its part orany effect resulting from operation of the server. In addition, in this case, youhave to pay for the repair even during the period of free-of-charge repair.5.1 Precautions5.1.1 Safety precautionsObserve the following notes to install, remove, or replace optional devices safely and properly.WARNINGBe sure to observe the following precautions to use the server safety. Failure toobserve the precautions may cause death or serious injury. For details, refer tofollowing pages Do not disassemble, repair, or modify the server. Do not look into the optical drive. Do not remove the lithium battery.CAUTIONBe sure to observe the following precautions to use the server safely. Failure toobserve the precautions may cause burns, injury, and property damage. For details,refer to following pages Do not install CPU/IO module with its cover removed. Make sure to complete component installation. Do not pinch your finger(s). Pay attention to hot components.
