I have about a dozen dead hueys. I've asked for them from some of the larger vendors that test their games.
Most were obviously abused in their lives, and may never work again.
You guys pointed me to the eraser trick that actually saved 2 of the dead ones. If cleaning the contacts with something like naptha doesn't work, you can try rubbing a pencil eraser to clean the contacts. Who knows, it may make a dead Daimakaimura work again - or not, depending on the problem.
I have also tried surgery - to remove the actual circuit to clean the contacts inside - only as a LAST resort. I've never had luck with this, but here are some pics of the surgery.
I'm curious what all everyone has tried with the dead hueys and what you have had success with.
One of my Screwyhueys is a copy of PC Genjin 2 - it works, but the video is entirely messed up. You can control the blob PC Genjin moving around the screen and make out colors and movement of some of the other graphics. It's very strange - yet kinda cool that the game actually is responsive and plays the audio just fine. If you had all of the levels memorized, you might be able to beat it. Now that would be a contest!