Vecadapt malfunction?

[genfuyung]

Just turned my vectrex on for the first time in a while and when my Vecadapt is plugged in, the up direction is constantly being pressed. I tried flicking the switches on the vecadapt, starting the machine with the vecadapt unplugged and then plugging it in once the power was on, tried plugging the genesis controller into the vecadapt before and after powering on, all with the same result. Even with just the vecadapt plugged in and no controller in the vecadapt its still holding the up direction. Anyone have any idea how to fix this? Pretty bummed out.

[+KylJoy]

I am looking at a Vectrex for someone and their issue was that when they plugged an AtariVox into the controller port it fried something. When I looked at the Vectrex I found that some of the controller port solder points had been bridged by solder. I guess either the solder bridges were always there but the unit functioned fine until the AtariVox was plugged in OR the solder bridging happened during a cap refresh or noise elimination fix. I'd be interested to know if your controller port has solder bridges as well that cause weirdness when something other than a controller is plugged in. Maybe we are discovering a factory flaw.

[BinaryStar]

Does it happen when the vecadapt is not plugged in? Permanently pressed or glitching buttons can be a sign of your sound chip failing. It's an easy fix - just replace the chip (providing your sound chip is socketed on the Vectrex PCB).