So last week I bought a Doctor V64 without a power supply, and yesterday my replacement power supply came in. So, just when I thought I was all set, it turns out that there's something wrong with it. It'll turn on (well, I can see the CD-rom drive functioning, and after reading the CD it'll give two soft beeps), but it won't give me a signal or respond to button presses (from what I found, pressing play twice should load the first game on the CD). I tried opening it and reconnect everyhing (just in case of a loose connector), but that didn't do anything. So, all I can think of are a defective CD-rom drive (which is mostly wishful thinking, because I doubt that a faulty drive would cause the unit to stop giving a signal), that the CD was faulty (in addition to a bad signal), a problem with the BIOS (if so, does anyone know if I can update the BIOS using a computer), or faulty hardware (which I hope to god is not the case). But yeah, can anyone tell me just what the most likely cause is? (I'd be very grateful, and even more grateful if it's something I can fix).