MacBook turns on only with the upper case disconnected
I spilled a cup of coke over my macbook. After disassembling and an alcohol bath I managed to start it up again by connecting the two tiny solder points on the logic board. Then, I connected the upper case to the logic board and was able to boot into snow leopard. The trackpad worked fine, but the whole right side of the keyboard was dead. After that I thought that I only have to order a new upper case to get it working again, but as I connected a borrowed and working upper case, the Mac didn't react when I pressed the power button. Even by connecting the solder points the macbook stayed off. Where could be the problem? The borrowed upper case has a different layout, because it's from a german A1181. I own an US device. Could that be the cause? Many thanks for your help.
Ist dies eine gute Frage?