Tharsis

OK, can any of you take screenshots from the toolbox of EQMOD, to see how the settings looks like?

Yes, the device is installed correctly, it becomes visible on the device manager, every time i plug it into the laptop. I have the latest driver from Prolific.

And why do i need to rase the levels from 3,3 to 5V, when the PCB is working on 3,3V, with 5V tolerance?

This is how the USB looks from inside, and how i connect the wires, assuming that the orange cable is RX, and the blue cable is TX. I have no idea what role is playing the white and the green cables, so i isolate them.

I have tried to make USB EQDIR, according to your post, and failed. The PCB is exactly as yours - PL2303HX Rev.A. I connect the wires exactly as you, but every time i connect my EQ5 Pro to the laptop (Win XP with the latest Prolific driver) a message is popup - "Port Not Available"!

Where did i got wrong?! Help please...