Default [Q] Help can't access diag mode LG G2 D803

I can't get into DIAG mode when I enter ##3424# (##DIAG#). Is there a different sequence for the D803 model? Or is there a manual way of getting this device into diagnostics mode?
I have all the drivers downloaded and device manager shows under Android USB Devices AndroidNet Sooner Single ADB Interface)
and under Ports shows LGE AndroidNet USB Serial Port (COM8) which is exactly what I want just can't seem to get DIAG mode to work.
Thanks in advance for any help.