Subject:
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Board not responding
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 23 May 1998 13:52:01 GMT
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Original-From:
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Mark Sokhwee Kim <mskim@mpdr0.chicago.=stopspammers=il.ameritech.net>
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Reply-To:
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mskim@NOSPAMmpdr0.chicago.il.ameritech.net
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Viewed:
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1146 times
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Hi!
The handy board was working good before
and I haven't used the board for a while.
Recently, I ran the downloader few times,
but I couldn't download the bootstrap.
I think the download mode is ready, but
the error message like "Board not Responding"
is repeating(I know the downloading procedure).
I believe there must be something wrong on chips.
I remember one time I got a short around the reset
switch while I was measuring the current. I still
wonder why a short was made on the reset switch.
There was a confusing LCD readout like blinking
few times. Since that time, I could use it without
any trouble till now.
1. Any possible way to check that some chips are
not properly functioning?
2. If U1 is wrong, any handy source for
purchasing U1?
Best Rerards,
Mark
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Message has 1 Reply:
 | | Re: Board not responding
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| (...) The most probable cause of this is a dead 6811. (it spoils rather easily... :(Because everytime i have a problem with the board, it turns out to be nothing more than a shot 6811. Even replacing the 7805 with a LM2931T kills it. (26 years ago, 23-May-98, to lugnet.robotics.handyboard)
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