Removing battery is not a solution here, i was answering some of this topic's previous posts. But you can safely remove it, and you should do so if it's too old (before it leaks).

marmotta said:

Is normal wait one minute for system start load? Yes on changed config, but I wait one minute every time I powerup the mac...

Click to expand...

I saw that once : there were both 60ns (gold connectors) and 70ns (silver connectors) DIMMs in a PowerMAC... maybe even that Interlaving was OK, I can't remember.

If you currently don't simultaneously use 60ns and 70ns in your 7600, there's a chance that one DIMM is not so good, or interleaving is too strange..

You should start diagnostic with minimal RAM config..