Technical support 
  A.2 Troubleshooting 
SIMATIC IPC847D 
Operating Instructions, 01/2014, A5E32997454-AA 
195 
USB device not responding.  The USB ports are disabled in 
Use a different USB port or enable the port. 
USB 2.0 device connected and 
Enable USB 2.0. 
The operating system does not 
support the USB ports. 
•  Turn on USB Legacy Support for mouse and 
keyboard. 
•  For other devices, you need the USB device 
drivers for the required operating system. 
DVD/CD drive door, if present, 
does not open 
The device is switched off or the 
open/close button is disabled by a 
software application. 
Emergency removal of the data medium: 
1.  Switch off the device 
2.  Insert a pointed object, for example, an opened 
paper clip, into the emergency extraction opening 
of the drive. Apply pressure carefully until the 
door opens. 
3.  Pull the door out further with your hand. 
The screen flickers when the 
mouse moves or when 
programs are called 
DDC information is not available. 
Possible causes: 
•  Monitor does not supply DDC 
information 
•  KVM switch does not forward 
DDC information 
•  Y cable adapter with DVI-I for 
DVI-D/VGA connector is being 
used 
•  Use a monitor that supports DDC 
•  Use a KVM switch that forwards DDC information 
•  Use a simple cable adapter with only one 
interface 
The startup of a Windows 
operating system on a GPT 
data carrier is aborted with the 
following error message: 
"Status: 0xc0000225 Info: The 
boot selection failed because 
a required device is 
inaccessible" 
The boot parameters in the boot 
loader file "BCD" are incorrect or 
damaged. 
Run "Startup and Repair" from Microsoft Windows: 
1.  Insert the Recovery DVD into the optical drive. 
2.  Start the boot manager using the <F12> key 
during booting 
3.  Select the line with "UEFI" in front of the name of 
the optical drive 
4.  Click "Next" in the language selection window 
5.  In the following "Install Windows" dialog, click on 
"Repair your computer" or press the <R> key. 
The "System Recovery Options" dialog appears. 
The system is checked for errors. 
6.  Next, click "Repair and restart"