hp 800 g3 boot problem

Does anyone have a similar problem, the situation is that I had to replace the PC but the hard drive with the settings and linux remained, now the same configuration hp ellitedesk 800 g3 will not go beyond the bios and shows an error that there is no boot sector? any advice or  

Disable "secure boot" in BIOS.

  I tried all three cases, it's always the same error, I just have to reinstall everything again, but with a lot of trouble...thanks for sure

I got the same error after CMOS battery lost. In my case, help reinstall bootloader only. If you know where your root partition is. In case of standard installation /dev/sda2. 
Guide:
boot from live installer disk or usb
select advanced install option
your favorit installer
rescue mode
language
root partition
and reinstall boot loader
hope it helps

Thanks Chris, I'll try to figure it out..

Thank you very much1..reinstalling boot loader fixed my problem:))