Technical information
8.6 BIOS description
SIMATIC IPC477E
Operating Instructions, 11/2020, A5E37455003-AF
161
8.6.6
Alarm, error and system messages
During startup (the boot process), the BIOS first performs a
P
ower
O
n
S
elf
T
est (POST) and
checks whether certain functional units of the PC are operating error-free. The boot sequence
is immediately interrupted if critical errors occur.
BIOS initializes and tests further functional units if the POST does not return any errors. In this
startup phase, the graphics controller is initialized and any error messages are output to the
screen.
The error messages output by system BIOS are listed below. For information on error
messages output by the operating system or application programs, refer to the corresponding
manuals.
On-screen error messages
On-screen error message
Meaning / tip
Operating system not found
Possible causes:
•
No operating system installed
•
Incorrect active boot partition
•
Wrong boot drive settings in SETUP
SMART failure detected on HDD
Hard disk reports pending failure through
S.M.A.R.T.
CMOS battery failed
CMOS battery is empty or not connected.
Real-time clock has lost power
The CMOS clock was operated without battery or
with a battery that was too weak, during battery
change, for example. Check the CMOS clock.
Keyboard controller error or no keyboard present Keyboard defective or not connected
