[Anonymous]

Hi Marco,

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.

Adam
Promethean Technical Support
Case 00570703