For those who have a PC Engine Core Grafx and CD-ROM2 connected by an IFU 30 who need a power supply, I have found a suitable replacement from Radio Shack. Radio Shack sells many universal type power adapters but only one is really suitable for the IFU 30. I picked up a core grafx, CDROM2 and IFU 30 about a year ago but it did not have a power supply so I was unable to test it. I had many power supplies from various Nintendo, Sega, Atari, and other video game and home computers lying around. While I was able to get the Core Grafx to work with one of these and the CDROM2 to play audio CDs, I was unable to get the IFU 30 working. I found what I was doing wrong recently. The IFU 30 requires 9V and a whopping 1450 mA (milliamps) of power. The switch selectable universal supply I had been using was only rated for 300 mA which is not sufficient. I found a unit that is used for powering small appliances when traveling that handles 9V and up to 1500 mA. Radio Shack part number is 273-1771. You have to get the correct plug which is part number 273-1715 (5.0 mm O.D. x 2.5 mm I.D. it is bent 90 degrees with a green ring aound the tip).A little problem I ran into was when I plugged the tip into the socket on the end of the cord, I put it in backwards and it didn't work. You can tell if you are plugging it in correctly because the tip itself has + and - markings on it. The socket at the end of the cord has the word 'tip' on it. Make sure the '-' symbol lines up with the word 'tip' and you'll be set. This power supply handles line voltages ranging from 100 to 240 volts so you can use it anywhere in the world. It plugs into a standard U.S. wall outlet, but you can buy plug adapters for other standard outlets at R.S. as well. The cost is 22.99 USD for the power supply. The plugs cost 1.99 USD, but you get to choose one free with purchase of the power supply. I hope this helps somebody out and the next time you see an IFU 30 for sale, but you're unsure about buying because the power supply is bad or missing, there is hope!