G4 iMac Black Screen - went pop!

Hi everyone,
This my first post (in the right place) and I must admit I am a bit desperate!
I have just turned on my iMac, there was a little pop and the screen remained black. The hard disk is spinning fine and has started up OK, so I can access it over ethernet (thank goodness!).
Unlike the other post about the black screen - I can't see anything at all, no outlines and it didn't go gradually, just a black screen... is the advice likely to be the same?
Thanks in advance for any help offered!

Perhaps the "pop" may have been the inverter. That'd stop the display from
working; or worse, some other part has gone toast.
Can you attach an external video adapter to run a VGA display; such as the
adapter normally included with the computer when new? If you can, at least
you can use it awhile and maybe archive your data or work off the machine,
and plan on when or where it may see this issue repaired.

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