I just got hold of an Atari 520ST, not STM or anything else. Turn it on, and I get a black screen without any video out whatsoever. However, 9 1/2 seconds after I turn it on, I get a very audible single "ding" bell sound. And I do mean 9 1/2 seconds. Timed it a dozen times, and about the only time difference was probably my stopwatch on/off reaction time.
Anybody ever heard of this or have any ideas? Maybe it means nothing, but could it be one of those red bombs, but in an audio format? My knowledge of the ST is about 20 years old, so who knows.
Thanks for any help.