Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual page 250

4.11 Memory Module
Installing a Memory Module
To install a memory module, make sure that the computer is in boot mode and powered off, follow
the steps below and refer to figure 4-18.
CAUTION: 1) Do not install a memory module in slot B only. Use slot A prior to slot B.
Otherwise, the computer or the memory may be damaged.
2) Do not touch the connectors on the memory module or on the computer.
Debris on the connectors may cause memory access problems.
1. Turn up the insulator and insert a memory module into PJ1400 (Slot A) or PJ1401 (Slot B)
on the system board at an angle of 45 degrees and press carefully to ensure firm connection.
2. Push the memory module down until notches on either side engage the memory module to
hold it in place.
3. Seat the insulator.
Satellite A20 Maintenance Manual (960-444)
4 Replacement Procedures
4-37