MAMEWorld Forums - Hardware - Jamma mame pc conversion

Having a problem with my mame cab conversion, I'm using an ArcadeVga and J-pac booting into the Mamewah Frontend, was working fine until recently but now receiving a cmos error on bootup and the bios returning to default(not saving) have tried replacing the battery and clearing the cmos but to no avail, I have came to the conclusion that there is an issue with the battery socket on the motherboard as If I leave the ac power connected the machine will boot up and shutdown no problem through windows as long as I leave the power connected, strange thing is though if I use the shutdown option within Mamewah the machine will not boot back up and it loses sync not displaying anything on the arcade monitor, I know it is the cmos error because if I disconnect the pc and connect it to a normal pc monitor I can read the error, so as-side from the obvious fact that I have a motherboard issue why does everything work fine until I use Mamewah's shutdown command? someone please help, I'm losing the will to live here