Fanuc CNC problem PWE not enabling and system hard key not functioning

[ayoobm]

The problem is parameter write is not getting enabled. Unit is not going in System mode.

At present APC alarms are displaying in message.
For this we were trying to set reference. We found parameter write is not enabling in SETTING (HANDY). There is no response if we press SYSTEM hard key.
I tried in MDI mode , tried by soft key ON:1/OFF:0 but not working for parameter enable
Model of CNC : FANUC Series 0i-TD.
Machine Builder Name : Colchester Harrison 600 Group

Please suggest us how to fix this problem. Waiting for your replies

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