Oh, I completely forgot about this until now!

Last summer I bought a TI-99/4a computer at my local flea market. With my luck, when I got it home, I realized that it never came with the power adaptor. I noticed that the slot in the console where you plug in the adaptor looks identical to the one on the ColecoVision. I tried using a ColecoVision adaptor, but the TI-99 wouldn't turn on.

My question, is it possible to use the ColecoVision adaptor, did I buy a broken TI-99, or did I burn it out when I tried to use the ColecoVision adaptor on it?