We would recommend adjusting the projector firstly with no source connected.
If this is also a Promethean branded projector you can visit our Knowledge Base and refer to the manual also.
Please go to http://www.PrometheanKB.com and check the projectors area out.
If you are still having issues please let us know.
Promethean Technical Support
- Release notes for ActivInspire v2.21 (released 5 January 2021)
- Release notes for ActivPanel Elements Series v4.3.0 (released 16 December 2020) and v4.3.1 (released 7 January 2021)
- Release notes for myPromethean portal v1.4 (released 2 December 2020)
- Release notes for ActivConnect OPS-G v2.4.4 (released 16 October 2020)
- Release Notes for ActivPanel Elements Series v4.2.0 (released 30 September 2020)