I have a LG Flatron W2442PA monitor.
Manual says "User must use shielded signal interface cables (D-sub 15 pin cable, DVI cable) with ferrite cores to maintain standard compliance for the product".

I have been using a DVI-DVI cable (2 x 9 pins) between Desktop PC (1 x 24 pins) and the LG Monitor (1 x 24 pins) with no issues and it still works.

However, I have a new HP ProBook 470 which uses HDMI 1.4a, so I purchased a Dynamix HDMI Female to DVD-D (24+1) Male Swivel Adapter from PB Tech.

The LG Monitor will not see the HP Laptop (with HDMI) or a Dell laptop E6420 (with HDMI).

Now I know virtually nothing sbout DVI apart from finding a web page on how to tell the difference from the pin configuration.

I assume the adapter (24 pin) is wrong for the cable and monitor.

What cable (DVI - HDMI) or adapter should I buy?
I am in Auckland and know most of the good PC shops