All, I just picked up, at the Manassas, VA, hamfest, a pair of new-in-box Texas Instruments 99/4a machines. Both boxes are a bit scuffed and dusty, but one still has the factory tape on it. I opened the other box, since it wasn't taped, and looked at the contents, which are definitely factory new. The computer was in a sealed bag, which I opened to check it out. The PSU and RF modulator are in their cardboard wrapper, which the adhesive has failed on. So, I decided to keep one machine. I checked the PSU, and the voltages were within 1VAC on both the inputs, so given that they are internally regulated, that should be close enough. Via RF adapter, I get a grey screen, at power up. Via a homemade composite video cable, I get a stable tone, and a black screen. So, two questions: 1) Does anyone want a new-in-box, untested, TI 99/4a beige model? 2) Does anyone know anything about fixing TI 99s? I'd like to go through the one machine and figure out what's wrong. - Alex