Hi,
I'm very new to electronics and RC Tech. I've got a copterx cx450 LiPo balancer charger that I may have fried: It didn't include transformator, and I (thought) that I had found the correct one, which was 9v 1000mA like specified. I didn't realize the output was AC, and the balancer needed DC input. The charger's lights turned on and everything seemed OK. But about 10min after that both LED's (indicating power supply & charging) turned off. The LiPo seems to be undamaged and the balancer was not really warm. But the transformator was very hot and doesn't seem to work. I have no other transformators to test, so, what chances are there that I may have fried the balancer and the LiPo, too?
Any help is appreciated!

do you have access to a volt meter?
check the voltage of the battery and see if it is the total voltage of the cells combined. also possible i believe to check by connecting it to the balancer and testing the outside red and black wire on the connector of the balancer to where it connects to the charger. there are battery monitors out there that will tell you the voltage of each cell but a volt meter should be able to give you a total voltage of the pack