Troubleshooting, Fault correction, Troubleshooting 17 – BECKHOFF CP66xx User Manual
Page 19: Can be used to determine the measures to be taken

Troubleshooting
Troubleshooting
Pixel errors
Note
Pixel errors in the TFT display are production-caused and represent no 
complaint-reason! 
 
 
Fault correction
Fault Cause Measures
The Control Panel shows no 
function when the Industrial PC has 
been started 
No power supply to Control Panel 
 
Cable not connected 
 
Check power supply cable 
 
1. Correctly connect cable 
2. Call Beckhoff Service 
The Industrial PC does not boot 
fully 
Hard disk damaged (e.g. by 
switching off while software running)
 
Setup settings are incorrect 
 
Other cause 
1. Boot with boot diskette 
2. Start SCANDISK 
 
Check the setup settings 
 
Call Beckhoff Service 
Computer boots, software starts, 
but control does not operate 
correctly 
The cause of the error is in the 
software or in parts of the 
equipment outside the control panel
Call the manufacturer of the 
machine or the software 
Floppy disk or CD access error
Faulty drive
Call Beckhoff Service
The Control Panel has only partial 
function, or only functions some of 
the time, for instance the picture is 
dark or absent 
Defective components in control 
panel 
Call Beckhoff Service.
USB error while USB access via 
TwinCAT 
Cycle time in TwinCAT set to 10 ms Change cycle time to 50 ms
CP66xx
17
