Siemens SIMATIC PG 720 P Manual page 88

Error Diagnostics
Table 7-1 Errors/Faults in PG 720 Operation
Error/Fault
Power-on LED does not light up
Display remains dark after power
up
External monitor remains dark
Message on the display:
"Invalid configuration
information... Press the F1 key for
continue, F2 to run Setup utility"
Message on the display: "No boot
device available"
Message: "Keyboard stuck key
failure"
Booting of the PG 720 aborted
with a series of beeps
Every time a key is pressed, a beep
is heard and no character appears
Not ready message when
attempting to read a diskette
Read-only error when attempting
to write to a diskette
<\> key does not exist
Mouse pointer cannot be moved
with the trackball
Mouse pointer moving erratically
Trackball not working
7-2
Cause
PG 720 is switched off
Power supply not properly
connected
Battery run down
Back lighting is not active
LCD enabled is entered in
SETUP
Incorrect configuration data
Diskette in drive A: is not a boot
diskette
Wrong hard disk type entered in
SETUP
A key became blocked during the
self-test of the keyboard
Error occurred during the self-test
Keyboard buffer overflow
No diskette inserted
Diskette is not formatted
Diskette is read-only
Read-only hole open on 3.5''
diskette
Wrong keyboard driver is being
used
The ball is not rotating
No or wrong mouse driver
Trackball dirty
Trackball is switched off
External mouse plugged in
PS/2 interface is set to external or
disabled in Setup
Remedy
Switch the unit on
Check the power supply, power
cable, and power connector
Charge or replace battery
Wait 3 to 5 seconds until the back
lighting is active
Enter CRT enabled or
SIMULTAN in SETUP
Press "F2" key, check the
configuration data in the SETUP
program, if necessary adapt the
default values, and check the
error messages in the first
SETUP menu
Replace diskette with boot
diskette
Use the "Autotype Fixed Disk"
function
Check the keyboard
Restart the system
Check hardware
<CTRL> <PAUSE>
Insert diskette
Format diskette
Cancel the write protection
German keyboard:
<ALTGr> <ß>
International keyboard
: <\> key
Clean the trackball and its
housing
Load the correct mouse driver
Clean the trackball and its
housing
Activate trackball with key
combination F + ^
n
Check Setup entry
PG 720 P Programming Device
C79000-G7076-C721-02