HELP PLEASE!!!!! I have no idea what is wrong with my iBook. I have years of expeiance working on PC's but Apple's? I will start at the top. One oh so faithful day I thought that is would be a good idea to open up my iBook to se about repalcing the Hard Drive with the faster and bigger 40gig, ibm 5400rpm 9.5mm drive. Well I opened it up..took it completey apart and studied the layout carefully...(just for the record, I have taken apart and fixed many, many PC laptops and repaired them with no problem, but i do not have the softwear tools to find out what is wrong with my mac). I decided that the upgraded could be done cheaply and correctly. I put it back together..(with no left over screws, i must have taken out 30+) and turned it on. It ran fine for about 3 days....then................GOD smited me. I noticed the problem when my computer froze. I could move the mouse, and the mouse turned into that spinning cd, but moved. I would click on something else and it took forever to changed screens....like 2 mins. Then is would stall again. And when i quit the app. it ran fine. Then it got worse. When i would go to install a app. it would freeze everytime it did a disk check before installing and took 15 mins. for it to unfreeze and start to install...(let me remind you that the system never crashed, just stalled like it was thinking, but was lost or daydreaming). Then it got even more worse. It would stall on booting OSX and it took forever for it to go to the logon screen. My solutions were............. 1) I did a hardwear test with the CD apple gave me... - it passed with no problems 2) I wiped the harddrive and reinstalled the OS. - it installed but then when it went to boot would no go any futher then the blue screen after the os load, but before the boot screen. 3) Instead of doing the OS instal myself, I used the Softwear Restore CD's..all 4. - it completly installed the CD's but at the end it falled the checksum and said the restore falied. 4) I ran the disk utility to verify the disk (used to osx install cd) - it said that it was alright So what does that mean...the computer will boot cd's and work great. IT will install the os but not fully boot them. The hardwear tests all passed. My only clue as to what the problem might be is the sound it makes when it stalls.