looking for help

[Patsy_3]

have a Dell optiplex780 with a LG FLATRON E2350 and receiving a code D-sub out of range 67.7KWz/1692Hz

 

[thejackal85]

Hello Patsy, please provide more details. What are you doing when this happens? Does it do this on boot? Has it always done this? Is the monitor a new one you decided to try?