4381 Views 1 Reply Latest reply: Mar 9, 2008 7:54 PM by S.U.
Welcome to Apple Discussions!
If your battery is 2-3 years old, it may just be getting worn out, especially if it has a lot of cycles. Batteries will wear out, both from use and from old age. If it is going south, then it could just be working more and more erratically. I believe the "X" is an indication that the battery is not being recognized. It may be that resetting the PMU will allow it to be recognized temporarily. But it sounds to me that the battery is likely bad.
The best test would be to find someone with the same PowerBook that you have and trade batteries and see if the problem goes with the battery. Or try as known good battery in your PowerBook. If you have access to an Apple Store, it may be possible they would have a known good battery you could try.
Also, remove the battery and see how your PowerBook runs off of the power adapter alone. If it runs with no issues, then there is not a problem with your hard drive replacement.
I replaced the 30 GB hard drive in my iBook with a 120 GB Western Digital drive. My battery was in good health, and I have had none of the issues you have been experiencing. My new drive does run hotter than the old one, so it's possible your new drive may be putting a slightly heavier load on your battery. So if your battery was marginal to begin with, the new drive may just be bringing out the underlying battery problems that likely were already there.
Hope this helps. Good luck!