We recently purchased some new Cisco 7945 Phones. The phone boots up and the display looks just fine, then it performs a firmware upgrade. The upgrade completes successfully and the phone reboots, upon reboot the display gets messed up. The sceen flashes white on boot and then when the phone boots it is black except for a small strip of color pixels on the left side of the screen. The phone appears to work properly, it can make and receive calls just fine, we just can't see the display. I thought possibly it was a problem with the phone, but then we tried some others and it is happening on all of them. So is there something in Call Manager I need to do in order to get the display to work correctly? We're running CUCM 9.0.
Thank you. Yes, I think you are correct. The phone came loaded with 9.3.1SR1, but CUCM downgraded it to 9.3.1 which triggered this bug. I've loaded the newest firmware (9.3.1SR2) for the 7945G in Call Manager, but the phones fail to upgrade to it. It just continually reboots... it's hard to see what is going on as most of the screen is cut off. I tried a different 7945 and it gives an error and fails to download the new firmware from the tftp server. The 9.3.1SR1 firmware works fine, but I've still got a couple phones messed up with the 9.3.1 firmware that will not complete the upgrade successfully.
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