Installed pop os with a usb stick but my laptop (Thinkpad L440) won't boot from the ssd. Secure boot is disabled, the installation works on an older thinkpad T520 and on my
Boot lenovo thinkpad from USB - YouTube
Boot lenovo thinkpad from USB - YouTube
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Buy Lenovo ThinkPad T520 Intel i5 2520M 2.50Ghz 4GB RAM 320GB HDD 15.6" NO OS | ACT
Windows 7 Clean Installation - ThinkPad T420, T420s, T520, W520, X220 and X220 Tablet - Lenovo Support SV