A Mac issue

[Xantar]

Yeah, I've already scoured the Apple support website. It hasn't really turned out to be too helpful. Besides, I figured it couldn't hurt to ask you guys.

So here's the problem. I have a 400 Mhz G4. I got it from eBay. As far as I can tell, it hasn't been modified except with 128 MB of additional RAM (for a total of 384 MB) and the hard drive has 80 GB of space (I don't think that big a hard drive comes standard with a non-quicksilver G4). It's running OS X.2.8 (beautiful OS, by the way). There are no external devices attached to it.

So those are the specs. The problem is when I put the computer to sleep for a while (like an hour or two), I can't wake it up again. I press a key, the screen comes on, and then after a few minutes during which time the cursor swirls, the screen gets overlaid with gray and a text pops up in English, French and some other language (I think it's Chinese) saying that I have to restart my computer.

I've read that this is called a kernel panic, but I'm not sure about it. Also, I heard that OS X.2.8 has been causing problems with computers. Do you guys have any ideas about what to do?

P.S. Before you say it, suggesting, "Get a Windows machine" isn't very helpful. And saying, "Macs suck ha ha" is just going to make me think you're an idiot.