That's quite unfortunate. All of mine have worked when their replacements arrived.
To that end, I've had three machines fail to GLoD, all resurrected. One was fixed by replacing a bad fuse and removing the inner frame to install parts onto it, in order to ensure that all boards were 100% seated (on my pre-production machine, the power board didn't like to seat properly otherwise).
One was cured by replacing the power board. The last was cured by replacing the processor daughter card (with an original 180MHz part).
A fuse check is undoubtedly a good idea, as replacing an SMT fuse is much cheaper and easier than buying a new board.
If they all check good, make sure everything is properly seated.
If that's ok, then perhaps now would be a good time to search for a G3 upgrade on eBay.
If nothing else, camp out on eBay until a bad 2400c shows up and buy it. I've purchased complete dead ones for less than $40 more than once. There's a good chance that a complete dead one will not have the same failure as your current machine, so at least you'd have one working one once you've transferred parts.
)
