I have many cp-6945 and cp-9971 phones.
The pushing of # at boot, and then typing 123456789*0# method works for cp-6945 but not for cp-9971.
There's a CP-9971 phone, which works fine but has it's display divided to two, so nothing can be read, or video cannot be seen correctly.
I've tried all kinds of Reset on Administrator menu (Device, All, Security). It's still divided to two, and left part of it has a lighter background and no onscreen buttons, right part works correctly.
is there a hard reset process for this model (cp-9971, not the popular 7791)?
The Menu option is the only reset, have you tried upgrading to latest firmware file?
Also, there is no popular 7791 phone, in fact there is no 77XX model, only 79XX, and now 78XX.
There's nothing like the #123... for 9971s. The rests you've tried are the only ones available.
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