To Reconfigure Your Computer; Replacing The Veriton 3900Pro's Hard Disk - Acer Veriton 3900 User Manual

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into the socket, turn the DDR2 DIMM around and try to insert
it again.

To reconfigure your computer

Your computer automatically detects the amount of memory installed. Run the
BIOS utility to view the new value for total system memory and make a note
of it.

Replacing the Veriton 3900Pro's hard disk

Follow these steps to replace your computer's hard disk:
1 Remove the computer cover (see page 55).
2 Detach all cables connected to the CD or DVD drive, the 3.5-inch floppy
drive and hard disk.
4 Upgrading your computer