I am going to put in a new battery,but will i get the same American megatrends screen?.
The
first time you boot after replacing the battery, you likely will get this screen and you should immediately enter the BIOS Setup Menu at that time.
Reset your system clock for the correct date and time (including time zone), check or reset your "boot order" to make sure your boot disk is above other disks, them make sure you select "
Save and Exit" to save the changes, exit the BIOS Setup menu and boot normally. You may still get the American Megatrends screen, but hopefully it will not indicate any errors and your time will be right.
Just be sure
BEFORE you remove the old battery that you unplug the computer from the wall, then touch bare metal of the case interior
BEFORE reaching in to discharge any static in your body. Observe the battery polarity (orientation in holder) before removing. The battery is most likely a CR2032, available at most battery/watch/camera counters. Do
NOT touch the new battery with your bare fingers as skin oils promote corrosion and attracts dust. I put a clean cotton sock over my hand. And once again, touch bare metal of the case interior
BEFORE reaching in. The battery holder is designed so the battery can only be inserted the right way - but it can be forced in wrong if too much force is used.
Also, while the case is open and unplugged, make sure the case interior is not blanketed with layer of heat trapping dust. Clean if necessary while frequently touching bare metal of the case interior to keep static buildup at bay.