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New Member

Weird Issue - CP-7975g boots into diagnostic firmware

Greetings all, 

This is my first post to this forum. I have a very strange issue for which I can't find an answer anywhere online, so I thought I'd take a stab at posting it here.

I am endeavoring to put together a phone system for my church (for which they have almost no budget) and have recently acquired a job lot of Cisco CP-7975g phones fairly inexpensively.

One of these phones boots into what appears to be a version of diagnostic firmware (Ver.:

See Attached Picture

Key presses on the numeric pad are recognized and are reported on the display. Pressing the # key results in ‘Enter option’ and ‘Invalid Option’ being displayed on the screen.

I have tried performing a factory reset of the phone (hold # at boot until line buttons flash in sequence then enter ‘123456789*0#’) but the phone does not respond to the # key being held at boot and continues to start up in the diagnostic firmware.

Could anybody throw me a bone on how to fix this problem?

Many, many thanks in anticipation.


New Member

Just bumping the discussion

Just bumping the discussion in the hope that someone can help me.


Thanks - Anton

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