iBook boots to blue screen

[facewax7]

Hi - hope someone can shed some light on this problem. I have a 700Mhz 12" iBook which had 2 replacement logic boards under Apple's replacement program. It had a new hard drive fitted a couple of months ago as the original died, and worked fine for a while (I run an eMac as my main machine with the iBook as a backup) but now won't boot up, except in safe mode.
It boots to the grey screen with the rotating "clockface", then abruptly switches to blue screen with nothing happening. It'll boot into safe mode OK, but I can't figure out what the problem is - I've run Disk Utility on it and verified and repaired permissions, booted from DiskWarrior and run that on it, but it still won't boot properly.
I've tried booting into Single User Mode and doing all the mount -uw stuff, that doesn't seem to make any difference. I've looked for third party items in the startup items folders in /Library and /System/Library and so on.
Any ideas, anyone?

[mudfrog]

Hmmmm weird this

The fact that you've done all the thing you have would suggest that you might have to reinstall your OS.
If you can take off all the data you need for a backup and reinstall OSX that would be your best bet.
Sometimes it's just better to bite the bullet and do a reinstall because by the time you search for a possible solution you could of reinstalled and configured your machine and be up and running in the same time that it would take to get it back as it stands. And would you trust the machine to last in the meantime?
I know I wouldn't.

Cheers,

Rich

[nixgeek]

You said you ran the mount command in Single User Mode. Have you tried doing a disk repair from there? Just type "/sbin/fsck -yf" and hit return. If it says anything about "FILE SYSTEM MODIFIED," run it again until it says that the Macintosh hard drive is OK. Reboot and post back with results.

[facewax7]

rebooted and tried your suggestion (I think I tried this 2 days ago but don't recall the result). It did the Checking thing and then came up with The volume iBook appears to be OK and then went back to the root prompt.

[mudfrog]

now try restarting iBook. Does it startup ok?

[facewax7]

no. Typed reboot and it started up, grey screen, rotating dial, then went to a different kind of blue screen - hundreds of horizontal blue & white or grey & white lines (can't tell exactly, I'm colour blind) then went black.

[mudfrog]

Well it might be time to bite zee bullet me thinks.

Sounds fooked

[facewax7]

OK, so where are those install disks... thanks for your input guys, appreciated.