My WRT54GS v4 is not keeping the correct time and date after rebooting. It starts with January 1, 1970 0:00 am. The ntp client doesn't work neither. It has DD-wrt 24 SP1 and lately started to become inaccessible 1 day after rebooting it. Now is not keeping time as well. Is it dying? does it have any battery for the CMOS that may need replacement? TIA for your help.