tloomis@polari.UUCP (Tom Loomis) (03/20/91)
I have just encountered a Mac SE-30 with a very strange defect. It fails
to
startup properly when first turned on for that day. Instead, it makes a
series
of musical tones, over and over, all the while displaying an invariant,
bilaterally symmetrical geometric pattern on the screen.
The musical tones it makes can be described in the following way:
First, let's say (arbitrarily, because I don't have absolute pitch) that
the
normal "I'm booting up ok" two-tone sound is essentially an E-flat major
chord within the octave from middle-C up. Then the "I'm sick and won't
boot"
sounds are:
1. E-flat minor chord (E-flat, G-flat), one octave lower; followed by
2. C, E, G, middle-C (all notes held)
3. pause
4. goto 1.
This is in 4/4 time; the second step is a triplet (CEG) followed by
another
one (in the third step -- middle-C,<hold>,<hold>) and a hold (the fourth
step).
Or in other words
1 2 3 4 5 6 7 8 9 10 11 12
^-----------^ ^ ^ ^-----------------------
E-flat - C---|---|---|-----------------------
E---|---|-----------------------
G---|-----------------------
middle-C----------------
Does anyone have any idea what is wrong with this machine? Any/all ideas
will be greatly appreciated!
I can be reached on this bbs as tloomis or by voice M-F 9:30-6 at (206)
764-2388, -2378, -2368.
Thanks in advance for your attention.
By the way, the machine DOES eventually respond to the programmer's
switch and boot normally, but only after about 30 min. of the above
behaviour;
and, it does not always malfunction as just described, but instead
frequently
boots normally.
Tom Loomis (Seattle VA Hosp)
tloomis@polari