All indication blinks

Can anyone tell me why all the indication on Siemens CPU 315 is blinking? what is the problem?

You might find some interesting posts on the Siemens support site:

https://support.automation.siemens.com/WW/llisapi.dll?query=cpu+all+leds+blink&func=cslib.cssearch&content=skm%2Fmain.asp%3Ftab%3D2〈=en&siteid=csius&objaction=cssearch&searchinprim=_searchinprim_&nodeid=99&x=16&y=8&x=0&y=0

I have experienced this myself too on a production 318 CPU but I was unable to read out the diagnostics buffer afterward.
 

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