Dell OptiPlex SX280 - Manual (Page 57)

9. Press <F2> to enter system setup and check the value for System Memory.
The computer should have changed the value of System Memory to reflect the newly installed memory capacity, speed, and mode (single or dual). Verify
that the information is correct. If it is correct, skip to
step 11 .
10. If the memory total is incorrect, turn off and disconnect your computer and devices from their electrical outlets. Open the computer cover and check the
installed memory modules to ensure that they are seated properly in their sockets. Then repeat steps 5 , 6 , and 7 .
11. When the System Memory total is correct, press <Esc> to exit system setup.
12. Run the Dell Diagnostics to verify that the memory modules are operating properly.
Removing Memory
1. Follow the procedures in " Before You Begin ."
2. Press out the securing clip at each end of the memory module connector.
3. Grasp the module and pull up.
If the module is difficult to remove, gently ease the module back and forth to remove it from the connector.
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CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of
your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.