Hi Darren.
Thanks for posting on the forum.
So we can advise further, please could you confirm the model number of your projector?
I would recommend testing the below to see if the issue happens:
Does the projector search for sources when another laptop is connected to the projector?
If so, please could you advise if you have any wall boxes or connection panels? If you do, please connect directly into the back of the projector and test a known working cable into your laptop. Does the issue persist?
I have created a Technical Support case to help assist with this issue should you wish to contact us directly, if you do, please quote your reference number which is: 00429269.
I look forward to your reply.
Adam
Promethean Technical Support
