IMac G5 - boots up to blue screen - tried everything

I have an iMac G5 (no iSight) 2GHz. Came across following problem (running MacOs 10.4.11):
- Normal boot: Mac goes through normal start up, but never gets beyond the blue screen - i.e. just before log in.
- Safe boot: boots up OK & can log in.
Up to this point, has been working fine for however long I have had it (maybe 3 years, I think).
I have trawled through the various sites and tried everything, including:
- Resetting PRAM
- Resetting SMU
- Disk Utility - repair permissions (some problems, now fixed)
- Disk Utility - repair disk (no problems)
- Apple Hardware Test from install disk 1 (no problems)
- Re-formatting disk & re-installing Mac OS from install disks (MacOs 10.4)
None of the above has fixed the problem - in normal boot it stops at blue screen, and if safe boot it gets through OK & works fine.
Next stop is the local Mac repair shop. But before I head off there, I wondered if anyone here could suggest anything.
The following link has three docs - full system profile, console log for unsuccessful boot (i.e. to blue screen) and console log for successful boot (safe mode):
http://www.pondlife.co.uk/public/iMac%20G5%20problem/
Thanks in advance
R.

my powermac is doing the exact same thing, did you ever find out what the issue was?
Thanks,
Landon

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IMac G5 - boots up to blue screen - tried everything

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