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HP ProBook 440 G4 Notebook PC

Hello guys,

I reinstalled Windows onto my notebook (had Linux Mint before) and nothing happend for a couple of weeks.
After I restarted the notebook three days ago, it just didn't boot into windows anymore.
I can't get into BIOS setup, even if it shows the "Entering ..." .

Recovery and the Win+B/V thing doesn't work as well.
What I tried so far:

  • remove HDD SSD and try to boot or at least get an error code -> nothing
  • put BIOS onto flash drive -> nothing
  •  put Diagnostic onto flash drive
    • after an hour and a couple of restarts, it did go into UEFI Diagnostic from the flash drive
    • could do system testing, showed nothing failed, but showed wrong date if that is concerning
    • couldn't do anything else
  • removed/changed and replaced RAM -> nothing

another strange thing, it did boot in GRUB ones as well from my old linux dist.

 

Hopefully someone got an idea, so thanks in advance!

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