I got a handheld unit thingy, and long story short, i wanna make a small modification so that the connector, a 24-pin ribbon cable can output video through HDMI
I can supply more info if needed
Without knowing what each of those pins do, there is no way to connect the cable to HDMI. Find out, match up the correct signals to the HDMI cable pin out http://astrapt.com/wiring/hdmi-to-rca-cable-circuit-diagram.php Or at least need to get it to something simpler like a VGA port and then use a VGA to HDMI converter.
Without knowing what each of those pins do, there is no way to connect the cable to HDMI. Find out, match up the correct signals to the HDMI cable pin out http://astrapt.com/wiring/hdmi-to-rca-cable-circuit-diagram.php Or at least need to get it to something simpler like a VGA port and then use a VGA to HDMI converter.