I have a sony vaio PCG-V505BX that has worked perfectly for about five years. I use constantly and i play online games on it too.Now the systems clock is malfunctionig and I do not want to spent $290 plus to sent it to sony for repair. How can find out for sure if it is the cmos bnsattery? i have tried the bios default setting and it is still doing the same thing showing wrong time How do i install a new cmos battery?

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