Trying to fix computer.. having a couple problems.

Hello. I'm trying to fix my brother's powermac g4 500. I purchased a new logic board for it and installed it. These are the problems i'm having so far:

1) I have to zap the pram before every boot or it won't boot. I have a brand new battery.

2) I've installed 9.2.2 on it (per my brother's request) and everytime I boot it up it tells me "the built-in memory test has detected a problem". Allows me to say ok and continue booting.

Any idea's would be so helpful. Thanks!

 

ok, yes! Fixed!! We pulled a memory chip that works with this mac out of an old pc and now everything is working properly!! Chime works, i don't have to zap pram. Thank you for your help.