Sorry for delayed answer. My history is looking so: one day I restarted my laptop Toshiba Satellite C655-S5068 and I have seen empty black screen with the small horizontal cursor in the upper left corner. Then I turned "OFF" laptop and then "ON" again and pressed and held button "0"( I tried to recall the recovery program). Instead of I got the Toshiba logo. After I pushed button "F2" few times I have seen a screen for setting up an utility through BIOS Insyde H20. In main part I can see system time, system data, CPU type, CPU speed and etc. but for HDD/SDD I see --NONE. I understand BIOS is not able to detect HDD. Then I pushed button F12 and set up booting from HDD/SDD. After time laptop goes to screen with text : Intel UNDI, PXE-2,0(build 083) Copyright © 1997-2000 Intel Corporation For Atheros PCIE Ethernet Controller v.126.96.36.199(12/15/09) Check cable connecting PXE-MOF: Exiting Intel PXE ROM No bootable device - insert boot disk and press any key I tried many times to boot from recovering disk, but every time I got nothing. I heard as CD driver is working but on the screen was the sign about " no bootable device". Why HDD is not detecting and looks like there is no access to it? How any diagnostic program will work in this case? Help me if you can. Thanks a lot for your answer!