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- Thin Client 620 new M.2 ssd shows "Missing Operating System"...

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03-03-2023 04:40 PM - edited 03-03-2023 04:41 PM
Product: HP Thin Client 620
Hi, I have replaced the 8gb M.2 on my HP Thin Client 620 with a 120GB Kingshark M.2 ssd. The M.2 is recognised. In the boot sequence it is only shown under Legacy Boot. I can also change the partitions with Gparted from SystemRescueOS (USB BOOT), so it is recognised. But when I want to install an operating system like BlissOS, PrimeOS or Ubuntu, everything works with the installation but then when I restart it and it boots from the M.2 operating system (Legacy Boot) it always says "Missing operating system". How can I fix this and sorry for my bad English
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