HP EliteDesk 800 G1 Tower Service Manual page 217

Drive not found (identified).
Cause
The device is attached to a SATA port that has been hidden in
Computer Setup.
Drive responds slowly immediately after power-up.
Nonsystem disk/NTLDR missing message.
Cause
The system is trying to start from the hard drive but the hard
drive may have been damaged.
System files missing or not properly installed.
Hard drive boot has been disabled in Computer Setup.
Bootable hard drive is not attached as first in a multi-hard
drive configuration.
Bootable hard drive is not listed first in the Boot Order.
Computer will not boot from hard drive.
Cause
The device is attached to a SATA port that has been hidden in
Computer Setup.
Boot order is not correct.
Solution
Run the Computer Setup utility and ensure Device Available
is selected for the device's SATA port in Security > Device
Security.
Run Computer Setup and increase the POST Delay in
Advanced > Power-On Options.
Solution
1.
Perform Drive Protection System (DPS) testing in system
ROM.
1. Insert bootable media and restart the computer.
2. Boot to the windows installation media and select the
recovery option. If only a restore kit is available, then
select the File Backup Program option, and then
restore the system.
3.
Install system files for the appropriate operating system.
Run the Computer Setup utility and enable the hard drive entry
in the Storage > Boot Order list.
If attempting to boot from a hard drive, ensure it is attached to
the system board dark blue SATA connector.
Run the Computer Setup utility and select Storage > Boot
Order and ensure the bootable hard drive is listed
immediately under the Hard Drive entry.
Solution
1.
Check SATA cable connections.
2. Run the Computer Setup utility and ensure Device
Available is selected for the device's SATA port in
Security > Device Security.
Run the Computer Setup utility and change boot sequence in
Storage > Boot Order.
Solving hard drive problems
205