I opened up my 130XE from eBay today. I was surprised to find a mod with a chip with a paper label that said OVXE by CDY. There is a 2 position switch mod on the back and a bunch of wires connected to various things on the motherboard. The 130XE works fine. I just don't know what's going on. I bought the unit so long ago that I can't find the buyer or other info.
Thanks