The orange light means it's charging, swapping to green is normal. Sounds like you still have a good battery.
Two things to try. One shine a light on the screen to see if anything is on the screen. May be a bad backlight if you see anything on the screen.
Two, if nothing is on the screen, it gives no beeps. Flip the unit over and pull the bottom to give a look on the inside. I have got three CF-18's that were non-booting working by pulling the motherboard completely out, including unhooking the bios battery and waiting a few minutes and reinstalling them. Just make sure everything is reseated good and you don't loose/tear the thermal pads.viewtopic.php?f=5&t=1146
There is our CF-18 guide.
Now even if it turns out dead don't give up hope. I have seen them popping up for sale alot but stripped out. Off of your doors, screen sides and keyboard will work on all CF-18's and some CF-19's. So you may find one later on that has been stripped and needs those parts.
I don't seem to have the country A the last number of your model number listed. Do you know any history of where the unit came from? Perhaps A = Australia, could be another one we could add to the list. As far as the 37 code goes some of that is explained in the guide. Are there any sticker on the unit that denote it came from a company?