second screen blank

[asg62]

Attached and activatied tri-screen 3 on a mac pro 17 laptop . The second (left) screen does not come on and sayd NO SIGNAL and goes blank

The right screen works

Any help appreciated . already reattached the mac adapter, no change

[rboerner]

Attached and activatied tri-screen 3 on a mac pro 17 laptop .

Please provide a direct web link to the specific product you are using.