No screen on my iMac G3 DV+

Hey everyone!
I have an iMac DV+ (G3 450) that I picked up at the local Goodwill store. It suffers from (what seems to be the common) failure of the built-in screen. Here's what I've done so far:
- plugged in an external monitor...I can see the system on the external monitor and it's working fine otherwise.
- checked the firmware rev by <Option> <Apple> <o> <f> at startup...it is "4.1.9f1 BootROM Built on 09/14/01..."
- tried to boot from what appears to be a retail OS 9.0 disc...boot failed; I think this is because I need to have at least 9.0.4
- connected the iMac to my iBook G4 and booted the iMac in FireWire Target Disk mode...erased the iMac's hard drive and re-installed Panther...still no screen.
I bought this assuming the problem was the firmware, but it doesn't look that way. Any advice would be more than greatly appreciated...
Thanks!
iBook G4, iMac G3 DV+ Mac OS X (10.4.8)

Hello and Welcome to Apple Discussions.
The disk swapping thing should work but personally I'd only use it as a recovery technique not a long-term solution.
I know the Firmware is up-to-date but have you tried working through the Firmware problem solver as it sound like this Mac is showing the same symptoms.
Merry Christmas
mrtotes

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