[DuoList] 280c 'boing' sound + question mark

[Lela Tong]

My 280c has been sitting in my closet for a few years.
 
I turned it on to get some files which I left on it.  Strangely, as soon as I plugged in the power cord, the machine switched on (without my pressing the 'on') and the floppy icon came up with a question mark.  And, the sound 'boing boing boing...' kept going.
 
I tried to insert the Disk Tools and clicked Disk First Aid but no volumes showed up except the external floppy drive.  And, when I tried to click the Apple HD SC Setup -- there was a flash of all the buttons (allowing a click) but it all dimmed except "Quit" and "Drive."  When I clicked "Drive" the message "unable to locate a suitable drive connected to SCSI port."
 
Also, on a re-boot or to press the 'on' button after shutdown, no icon appears but a lit blank screen comes up.  The only way to get the icon with the question mark is to completely unplug the computer and to replug it.
 
I fear the worse -- any helpful hints on how I can fix this?
 
Lela

		
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