Hello,

I have been reading for adjusting the brightness of AIO's in monitor mode on this forum. But I could not find anything for the latest A540 model. Double pressing the monitor mode button does not work on this model. It also doesn't have any other hardware buttons. Is somebody having any idea? Monitor mode seems a bit redundant if you cannot change brightness.

Thanks.

Regard, Steven

Did you get any solutions? I have the same problem, it is so bright in monitor mode that I cant use it without getting a headache :(

Hey

Thanks for your reply. 
I am taking this further, as it is not fit for the purpose it was intended. Lenovo suggested the software called Monitorian from the Microsoft store, but it didn’t work well enough. I am in the process of arranging a repair / replacement screen / alternative solution.  I have limited space, I wanted to use it as a 2nd monitor for work and a pc for me. It is now sitting unplugged as I had to buy another monitor for work. Yep the pc on its own works okay, but overall it’s like buying a car with 2 wheels!!