Desktop computer is only turning on for a few seconds

[COKEDUDE]

My desktop computer is only turning on for a few seconds after that it turns off. I assumed it was the power supply so I bought another one. Last night I installed the power supply. It took awhile with me reseating everything and taking out the cmos battery to get the computer running. After that I used it for about an hour. I went home and came back to the office the next day. Unfortunately it reverted back to the behavior of only turning on for a few seconds after that it turns off. Can I please get some suggestions on what to do?

 

[mrjimphelps]

Change the CMOS battery. The one you now have may be bad. (Test it, if you have a multimeter.)

A bad CMOS battery can cause your computer to play dead; then when you replace the CMOS battery, your computer comes back to life. This happened to me.

 

[COKEDUDE]

Change the CMOS battery. The one you now have may be bad. (Test it, if you have a multimeter.)

A bad CMOS battery can cause your computer to play dead; then when you replace the CMOS battery, your computer comes back to life. This happened to me.

I do have one . What should the voltage be of a cmos battery?

 

[mrjimphelps]

According to Best Buy, the CR2032 CMOS battery (that's the most common size) is 3V and 240 mAh.

https://www.bestbuy.com/site/energizer-cr2032-battery-2-pack/6017135.p?skuId=6017135