input signal out of range, reset to 1280 x 1080

Hi

I wonder if anyone can help me with this problems that has just started today. I have an Acer Aspire V5 which has just been updated from Windows 8 to Windows 8.1. This laptop is used for training and is usually connected to a training monitor for students to follow along with the trainer.

This has worked perfectly until I updated to Windows 8.1. When I connect to the training monitor I get a message saying 'Input Signal Out of Range, reset to 1280 x 1080 60ghz. There isn't a setting for the above resolution. Everything works fine until I connect to the secondary monitor. Annoyingy the message remains on that screen - I can't remove it.

Any suggestions will be gratefully appreciated.

Thanks George

Are doing an extend or duplicate? If duplicate, try extend.