the 4000t was built for the toaster. the toaster is NTCS only and ever. IMO one of the best features of the tower is the fact that is has t video slots.... one forthe the toaster and on frooa piccassoIV with scandoubler.... now forget those flickery d1 displays.
Now put down the solder gun before you blow the whole thing up. May not need to send of to france (cost will kill you) but you do need to take a deep breath and start looking for spare parts, don't hurry...you did not ahve a toaster until now you can wait a few more weeks/months to find a spare av module. If you don't have serious experience with computer electronics, DON'T solder around on your 4kt, find something replacable....