Technical support 
  B.2 Troubleshooting 
SIMATIC IPC677E 
Operating Instructions, 04/2019, A5E45117996-AA 
145 
Although the BIOS setting is 
OK, the time and data are still 
The backup battery is dead.  Replace the backup battery. 
USB device not responding.  USB ports are deactivated in the 
BIOS Setup 
Use a different USB port or activate the port. 
Operating system does not support 
the USB port. 
•  Activate the "Legacy USB Support" setup pa-
rameter in the "Advanced > USB Configuration" 
menu of the BIOS Setup. 
•  For other devices, you need the USB device 
drivers for the required operating system. 
B.2.2  Problems when booting the device 
 
After changing the hard disk, 
the system does not boot from 
the RAID array 
RAID array does not have highest 
boot priority 
BIOS setup, Boot menu: 
•  Permit RAID system in the boot priority 
•  Give RAID system top boot priority 
After changing the drive, "un-
used" is indicated for the rele-
System was booted without func-
tioning hard disk. The removable 
tray might not be fully pushed in. 
Reboot the system with a functioning hard disk. 
Computer does not boot or 
"Boot device not found" is 
displayed. 
The boot medium is not approved  Allow the boot device in the boot priority in the "Boot" 
The boot device is not in first place 
of the boot priority in the BIOS 
In the BIOS setup "Boot" menu, change the boot 
priority of "Boot device".