Lenovo ThinkPad P1 Gen 6 LTE1 User Manual page 33

Note: During the UEFI BIOS update process, Memory Reference Code (MRC) change might cause memory
retraining. Memory retraining is a process to initialize the memory module and run diagnostic tests for the
memory module in your computer. When memory retraining occurs, the screen might be blank. You might
see the LED indicators on Esc, F1, and F4 blinking sequentially to indicate the progress. Do not press the
power button to interrupt the process. Wait a few minutes until the logo screen is displayed.
To know more about UEFI BIOS, visit Knowledge Base of your computer at https://pcsupport.lenovo.com .
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Chapter 5 Configure advanced settings