hi there, hope somebody can help? i am trying to connect a touchscreen controler card to my laptop. the disstrictions say the card can get its power either via 2 terminals @ 5v or through the rs232 port, the cable that came with it has a 5 pin connector to plug to the board and a 9 pin d plug on the other end. they are marked as data in, data out, rs232 ground, +ve and +v3. before attaching to the board i tested with a volt meter but the power between both the power lines and the ground reads -7.7 volts! do i need to change something on the laptop or is this not an rs232 port (its marked I/O and my modem used to plug in hear and work fine) any help would be great, thanks.
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