POE 7965-G / 7945 IP Telephones Not Booting Up / No Display

[Val Constable]

I have been through endless treads and looked at multiple Network configurations and for the life of me I have not been able to fix 16 IP phones. So I hope this message reaches you in good spirits and you are able to help me out.

Issue - When I plug the phone into a known good POE connection - The phones go through a power boot - then no display comes up - Then they go dead and un-responsive.

I have tried using an external - Power source - CP-PWR-CUBE-3 / Model -PSC18U-480 - ONLY ONE (1) IP phone model 7945 came up with a display - But after several attempts after factory resets using the 123456789*0# and 3491672850*#

  - The phone just sits at a white Cisco display screen - saying Upgrading - And a visible number - 6C:50:40:DA:75:62

NOTES :The Cisco 6500 E - is the DHCP Server - There is an option 150 set using IP address for the Cisco TFTP Server &  they are in the same Pool.

CUCM - TFTP Service is running - Cisco MCS 7800 Series Media Convergence Server.

There are existing  136 IP phones (7965 G & 7945) in the environment and I am able to communicate with the devices to make changes and or configure via CUCM Version 7.x

There have been multiple moves involving  PC / Desktop & Phones in the environment so after the phones are unplugged from the POE Source and moved to another desk within the same environ - The existing  phones which was functional within the environment prior to it being moved, comes up without any issues after the obvious Power Down and Power Up process.

Regards,

Val

[Aman Soi]

Hi Val,

This means the working phones when moved to non-working site are also functional.

If yes, then, there could be problem with phones.Were these phones working earlier or just stopped now?

regds,

aman

[Val Constable]

Hello Amanso, to answer the part of your response - When working phones are moved within the environment - After they have been unplugged form the POE Source and moved to another Desk per say within the same environ - After the device is plugged to its POE Source- They Power up and function properly without issues and I am able to make changes on the device using CUCM (this is in regards to the moved phones).

Unfortunately I inherited the phones Non- Functional was told they was working and suddenly stopped working, hence my investigative mode on how to fix the phones.

Thanks,

Val.

[Aman Soi]

Hi Val,

this means inherited phones are a problem.

Why don't u try raising RMA for one phone provided u have a Contract?

regds,

aman

[Val Constable]

The client does not have warratee on the phones and Cisco already confrimed that they are Not End Of Equipment.

Regards,

Val....

[Aman Soi]

Hi Val ,

try doing factory reset on another problematic phone as last option.

regds,

aamn