I believe the NEC 2A is more of a dual sync than a true multi-sync monitor and the one you found may have lost its ability to switch to the lower 15kHz scan rate. I have one around here somewhere and remember when I last used it years ago, that it makes a lot of noise when it switches from 15 to 31kHz and back. It made me think it was going to blow up, or just quit working at any moment. Try it again after it is warmed up or just give it a good kick! Afterall, you did say it only cost you $14 :-D
