NEC VERSA TXI Manual page 66

Locate the dip switch block. Using a fine-tipped object, change switch 5 to "ON"
4.
to enable the BIOS flash.
the pencil can damage the system.
Note
to replace your SO-DIMM module, you might want to do so while the system is already
disassembled.
Replace the memory module bay cover and screw.
5.
Turn over the system.
6.
Follow the instructions later in this chapter, "Performing the BIOS Update."
7.
3-28 Using the BIOS Setup Utility
Never use a pencil to change switch settings. Residue from
BIOS flash switch enabled
The system memory module slot is also located here. Therefore, if you need