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I can boot from USB but the Ubuntu installation on my internal hard drive does not boot. I have reinstalled Ubuntu but it's still saying no boot device found.

This is what I can see in Gparted from a live USB session

Gparted screenshot showing ESP, 200 GB unmounted ext4 partition, 200 GB ext4 partition mounted on /media... swap and small unallocated

Zanna
  • 72,312

1 Answers1

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Go to BIOS setting and check Boot-Device Option setting, Internal HDD must be enabled there or Simply Load Default the BIOS setting.