LG LU20 User Manual page 84

Caution
Use only the memory module sold by LG. Using other memory modules can
damage your computer.
Close the cover and tighten the screw.
After the installation, reboot the computer. If you see an error message regarding
memory capacity, click F2 to enter the BIOS Setup Utility and save the settings.
Note:
When rebooting the computer, make sure the size of installed memory is correct.
If different, re-install the memory module.
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