Black screen after replacing CMOS battery

[Gdog96]

So, I was getting checksum errors on an old shuttle PC, so I bought the correct CMOS battery to replace it. 

 

However, when I turn the system on after replacing the battery, all I get is a black screen, I don't even get the opportunity to get into the BIOS. 

 

If I replace the old CMOS battery it will boot again, but with checksum error. 

 

What is going on here and how do I fix it?

 

Thanks

[Guest]

Maybe new one is leaked or by some miracle short circuited.

Try third one.

[i_build_nanosuits]

So, I was getting checksum errors on an old shuttle PC, so I bought the correct CMOS battery to replace it. 

 

However, when I turn the system on after replacing the battery, all I get is a black screen, I don't even get the opportunity to get into the BIOS. 

 

If I replace the old CMOS battery it will boot again, but with checksum error. 

 

What is going on here and how do I fix it?

 

Thanks

just use the battery that is working and reset the CMOS by jumpers instead...