I have a G1 Omega Supreme. Complete. Put batteries in and he does not work. Anybody here know how to take him apart and fix him?
You should be able to open it up with a screwdriver or two (the screws are often hidden under stickers - you should be able to spot the indentation easily enough). You may have to lever open some parts that are held together by plastic barbs.
As for fixing it - the electronics were very simple in those old toys (I have the original Astro Magnum that later became Shockwave), just lights and sounds, but I don't know how you would repair them. I think the very basic chips in them just degrade over time (especially when smashed about a lot, as Transformers tend to be ).