Imranromi! Thanks for trying to help! I don’t know where the BIOS gives an error, since it does not appear in the menu in any way. Most likely, there is simply no BIOS on the laptop after the service center. Before their work there was a bios and windows started. I can’t even enter the BIOS in any way at all. My attempts to install bios also do not give a result. The keyboard is working. 100% but the buttons "DEL", "ESC", "F10", "F9", "F2", "F1" not give result too. Downloading BIOS from a FAT32 MBR FREEBIOS USB flash drive created with the official utility does not work either. I use all combination: "WIN"+"B", "Fn"+"ESC", "WIN"+"V". I don’t know what to try.