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SIMATIC S7-300 / S7-300F: S7 319 - Every front LED flashing

Haven't seen this before, just wondering if anyone know what this is.?
I have a new 319 3DP/PN PLC
have just downloaded a HW config with just a CPU and comms enabled. only need this for testing.
After the HW was downloaded I was about to download the program etc when i noticed every led is flashing!
I can power cycle the PLC but the same things happens.
I can no longer establish comms to the PLC either.
Yes I have a mem card and have tried another new mem card of 4mb, still the same.
I cannot download an alternative HW config as I no longer have comms.
Any ideas?
just wondering if the PLC has failed.
thanks

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