Firmware/BIOS description (SIMATIC IPC BX-56A, IPC BX-59A) 
8  Operating Instructions, 10/2023, A5E52427534-AA 
Using firmware selection menu 
2.1  Opening firmware selection menu 
Procedures 
1.  Switch on the device or restart the device. 
2.  Immediately press the <Esc> key and hold it down. 
Open firmware selection menu manually 
 
Windows®10 operating systems: Alternative procedure for opening the firmware 
selection menu
 
  Start Windows®10. 
  Press the <Shift> key and keep it pressed. 
  Select "Restart". 
The "Choose an Option" window opens. 
  Select the "Troubleshoot" option. 
  Select "UEFI / Firmware Settings". 
  Click "Restart". 
Result 
The "Main Page" with options of the firmware selection menu (Page 9) is opened.