I have the 7130g which I can not figure out what's wrong with it, I run a search on google and this forum but no joy.
when battery is inserted on BB or it is plugged to the mains, it shows a battery on the screen with red cross on it, I have reloaded the OS but this did not help, would be correct to assume that my BB is dead and need new one.
Your help is much appreciated, thanks.

Wirelessly posted (At&t curve)

That usually only appears if there is no battery installed, or the battery is stone dead. I would start by trying a different battery.

Actually I tried it with a different battery which works on other BB. Thanks