I have two of the same spec PowerMac G3's I am working on, they both have the exact same problem. When I boot, or restart, I get the Apple chime, and that's it - black screen. The only way to get it to boot is to reset the PRam every time. I have done some research and found that I might be dealing with two dead PRAM batteries. Does anyone have any input on this problem?

update: these are Blue & White PowerMacs. 400 mhz - default Rage 128 video card - 10 gb scsi HD.