I have an Optiplex 7010 with an SDD running Windows 7.
I then installed a pre-owned HDD that was supposed to be the secondary drive but no matter what I try the computer will always boot from the HDD or not boot at all.
SDD is on SATA0, CD/DVD is on SATA1 and HDD is on SATA2.
Boot mode is set to Legacy and boot sequence shows only the SDD enabled (see pictures attached).
If I disable the HDD/SATA2 SDD takes over and boots Windows 7 from the SDD.
If I disable the HDD/SATA0,the HDD takes over and boots Windows 7 from the HDD.
If I leave both enabled and mark only the SDD as a boot option, then the screen goes black with a mixed color line at the top (see picture).
BIOS has already been upgraded to the latest version available at Dell support site.
Back in the old days there were switches or jumpers to setup but guess this became history long ago.
Thanks in advance.