Date   : Fri, 26 Jun 2009 19:45:58 +0100
From   : mike@... (Mike Tomlinson)
Subject: Only one beep

In article <4A44FFD0.4000008@...>, Chris Long
<chris@...> writes
>
>    Thanks for your suggestions.? I figured it must be very close to 
>    booting - do you know at what point in the boot sequence the second 
>    higher beep occurs?

When the OS starts a language (Basic) I think.  It's the last thing it
does in the boot sequence.

>? From what I've read, it seems that the video 
>    output chip is programmed during the boot sequence, and it doesn't 
>    seem to be getting that far, judging by the lack of any meaningful 
>    video display.

If the OS is unable to program it, it would halt with a continuous
single tone.  Since you're able to toggle the caps lock light, the OS is
running.

Are you using a TV?  If the keyboard connector is not making contact,
the machine boots into mode 0 with nothing on the screen (only a
flashing cursor).  If you're using an old or misaligned TV you may not
be able to see the (small) cursor.  Does the screen (although it appears
blank) flicker and lock?

>    Unfortunately I've already tried removing and replacing as many 
>    chips and cables as I could get to - there are some chips that I 
>    couldn't remove because other components block the path of my 
>    screwdriver, particularly the system 6522.

Are the symptoms still EXACTLY the same?

-- 
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