need help about my mobo

tinanggal ko yung CMOS battery and hinayaan ko sya mag off ng 1 hour. pag bubuksan ko mag rerespond naman yung numlock ng keyboard for about 5 seconds tapos stuck up na. next time bubuksan ko ulit hindi na rerespond yung keyboard at all.

what's interesting is after hayaan ko nanamang mamatay sya for 1 hour and buksan ko ulit, reresponde nanaman yung keyboard for about 5 seconds again tapos hindi nanaman.

mukhang cmos nga ang problem pero tinanggal ko na nga yung cmos battery. anong pwede kong gawin?

mobo in question is gigabyte ga-f2a55m-ds2