Epson EL 486UC User Manual page 64

If any of the pins are bent, straighten them gently with your
fingers or with small tweezers to align them with the other
pins. Be careful when you do this; the pins are fragile and
can break off easily.
4. Position one of the memory chips over the first empty socket
as shown below, aligning the pins on the chip with the
holes in the socket. Make sure the small notch on the end of
the chip is aligned with a similar notch on the socket.
5. Gently press the chip halfway into the socket (to make sure
it is correctly aligned). If the chip goes in at an angle,
remove it with a chip puller or a small flat-head
screwdriver and try again,
6. When the chip is properly positioned, push down firmly on
both ends of the chip to make sure it is well-seated.
7. Repeat steps 4 through 6 for each of the remaining chips.
8. Replace any option cards you removed. See page 3-14 for
instructions.
When you start your computer, it displays the video memory
briefly before it begins its memory test.
Installing and Removing Options
3-21