Hi Jordan,I assume you are running into a browser issue. I see a lot  users still using IE9 which is not supported.What Version of IE are you using?Spark is only supported from IE10,11 or higher.You can check what browser jabber is using by adding a ...

Hi MarkAre all 6921 phones affected? Usually if only the Handset is affected the reason is hardware. Most of the time the handset cable (or connectors).Best Regardsslashdots

Hello ThorstenHave you checked if the Phone receives enough power?If possible try to boot the phone with a external power supply.Best Regardsslashdots