Hi, Thank you, but this was not a service request. We have resolved the issue by restoring the MBR manually using the command utility from the Windows installation medium in repair mode. bootrec.exe /FixMbr
Hi, We have a Precision T5600 with Intel RST and RAID1 system drive. When powering on it goes through the Dell screen the Intel RST config menu appears, shows both mirrored drives as ok and array as bootable and then it goes to a black screen for about 10 sec only for it to cycle back to the Dell screen - repeat. (Apropos should be booting Windows 10) I can F12 into Boot menu and boot Ubuntu from USB stick or DVD fine. Boot menu says Legacy boot mode and secure boot turned off. That is as it should as the system drive is MBR. I'm puzzled that there isn't even an error message or that it just sits and wait. Any ideas what this behaviour points to? (I would go for restoring MBR next)  
Precision T5600 not booting cycling back to Dell screen