Error Type 102, Unimplemented Trap, Will not initialize...

Question

Among a lot of eight iMacs that were donated to us, there are a pair of them each with their own issues. Both are old CRT iMacs from 2001 with 266MB of RAM.
(#1)
This iMac initially was advertising an "Unimplemented Trap." I could boot up with the shift key or the C key down, but not otherwise.
By the recommendation of a number of websites, I tried altering the extension expression with the extension manager. Even if I unchecked every box in the extension manager, the reboot would not be successful, requiring either shift or C to be pushed to get past the "OS 9.2" boot screen.
With the computer not responding to the alterations in the extension manager, I put in the OS 9.2.1 disc and ran a complete install. During installation, it warned me that the Remote Access 4.0 required Open Transport 2.0 (or something to this effect).
After the install, I am now getting an "Error Type 102" at start up. I can still restart with the shift or C key, but I remain unable to have any positive effect on booting even after unchecking every conceivable box within the extension manager.
Any suggestions?
(#2)
This iMac boots successfully in the sense that it gets beyond the start up screen to the Desktop. Once it gets there, mouse inputs are received with respect to movement, but neither key strokes nor mouse clicks have any effect.
When a CD is not in the drive, it will load a window labeled "Launcher" with nothing inside at the moment the computer stops initializing.
When a CD is in the drive, it will load a window displaying all of the CD's contents at the moment the computer stops initializing.
When I boot with shift, the Extension Manager can not be opened, "because it is locked."
When I try to boot with C, I get an icon of a disk with a flashing question mark at the initial gray screen.
Problem with the CD drive? Any ideas?
Thanks a million. Getting these computers working would be a huge help: we need them to be working when school starts in two weeks and we don't have the money to purchase new computers.

Answer 1

To Apple Discussions!
*Unimplemented Trap Error*
Probable Causes: There are several.
Can involve the Macintosh's ROM (read only memory), where core operating system routines are stored. The error can occur when a request made for a routine that's in ROM could not be completed because the routine was unavailable. Typically, this error is caused by older software that assumes an older version of ROM. The software in question could be an application or a system extension.
Unimplemented Trap error can also occur when the Macintosh model or the system software is too old for your application(s). While most software is written to be backward compatible (i.e., designed to work with older hardware models and system versions), it is not possible to be compatible with every Macintosh and system software version.
Possible Solutions:
Make sure your software is current and is compatible with your Macintosh model and system software.
Most software applications include system requirements in the documentation or on the outside of the box. If your configuration does not meet the minimum requirements, upgrade your configuration as necessary.
Similarly, if you are using an application that is more than one major version older than the current version (major versions being 2.0, 3.0, 4.0 and minor versions being 2.01, 2.2, 2.2.3, etc.), but your Macintosh model and system software are current, upgrade your application to the current version.
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According to Article: http://support.apple.com/kb/HT2088 Mac OS System Error Codes: 1 to 32767
Error Type 102 = System is too old for this ROM
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http://docs.info.apple.com/article.html?artnum=58042 Macintosh: Flashing Question Mark at Startup
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"Among a lot of eight iMacs that were donated to us,"
Hopefully, you were also given the System CDs that originally came w/those iMacs. If not, you can get replacement System Install & Restore CDs from Apple's Customer Support - in the US, [phone] - for a nominal S&H fee. You'll need to have the model and/or serial number of your Mac available.