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BIOS message 'connect higher wattage power adapter'

HP Recommended
Probook x360 11 G5 EE
Microsoft Windows 10 (64-bit)

Hello,

My Probook didn't start recently : black screen, highlighting of the Shift key (2 long, 2 brief) => apparently BIOS problem.

I downloaded the more recent BIOS firmware for this laptop : sp110654.exe =>

- 1st message : HP BIOS Version Mismatch (Boot Block = v02.00, System BIOS = v04.01), I go on.

- 2nd message : Secure Boot, 'A device added is signed with the Microsoft UEFI CA and can't be used...', I click on Enter Setup.

- 3rd message : 'Battery is charging but for full performance connect higher wattage power adapter'.

And then shutdown.

I don't know what to do next.

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