Lately, when I have my Zaurus (C860) opened about 135 degrees (usual position for typing on a flat surface) sometimes the screen just falls back to a 180 degree position. I guess the hinge is getting a bit loose and can't support the weight of the screen. Does anybody have a suggestion? Would it be something that is easy to fix if I opened it up? It would be a shame for this to be the end of an otherwise perfectly functioning device. It's not bad at the moment, just happens occasionally but I can see it will just get worse.