Subject:
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Re: Help needed reviving my HB
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Tue, 2 Nov 1999 06:46:00 GMT
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Original-From:
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Hui Pak Ki Partick <huip@NOSPAMhkstar.com>
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Viewed:
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981 times
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Hello,
Sorry, I made a mistake.
"74HC244 was dead" should be read as "74HC373 was dead" This is the one
soldered on the board directly without socket. It is located underneath
the SRAM.
Removing all ICs except 74HC132, 62256 SRAM, and MC68HC11 CPU and download
the Pcode to test it.
Sorry again.
Patrick Hui
Robot Store (HK)
http://www.robotstorehk.com
On Tue, 2 Nov 1999, Hui Pak Ki Partick wrote:
> Hello Edward and everyone,
>
> There are several causes that the Handyboard won't boot.
>
> 1) 62256 SRAM was dea
> 2) 74HC244 was dead
> 3) The Handyboard cannot put into bootstrap mode
>
> You can try to do the followings:
>
> Removes all the ICs on Handyboard except 74HC132 and 62250SRAM, put the
> LCD on the board. Set the board into bootstrap mode and download the Pcode
> and see if the board boots.
>
> During the Pcode downloading, the GREEN LEDs on both Serial/Charger board
> and Handyboard main board will be flashing. After couple seconds, the
> GREEN LED on Handyboard main board will stay on while the GREEN LEDs on
> Serial/Charger board still keeps flashing.
>
> If failed, some components may be damaged, and you may need to return the
> board back to us for repair.
>
> Thanks and Best Regards,
>
> Patrick Hui
> Robot Store (HK)
> http://www.robotstorehk.com
>
>
> On Mon, 1 Nov 1999, Edward Delaney wrote:
>
> > Hi Everybody,
> > Ensio, I'm having a very similyar problem, but with an interesting twist!
> > Check this out! I still don't have any idea what is going on here...
> > None of these have expansion cards.
> >
> > I have 5 HB's from when this robotics class was taught 2 years ago. 2 of them
> > do not work, 3 do. The two that don't work apparently worked at some
> > point, but will no longer download, will not synch.
> >
> > We purchased 2 kits, and got stopped at the exact same place you did,
> > after we put in the memory we could download IC without errors, but
> > the HB's will not boot it.
> >
> > So, in desperation, we purchased 2 brand spankin' new pre assembled
> > boards. Neither of these two will download at all. I see the green
> > light on the charger unit flash, but nada from the HB.
> > I use the charger/communications unit that came with them.
> > If I use the windows DL program, it just says the board is not ready
> > or the port is wrong.
> > I took the cables and chargers from the working boards and used
> > them on one of the new ones. Nothing. I thought maybe my 200mhz
> > Nec laptop was too fast so I used on of the old Macs that we're using
> > successfully in the labs, still nothing.
> >
> > The only thing I can think at this point is that all HB are not created
> > equal.
> >
> > Any ideas?
> > thanks,
> > ed
> >
> > -----------------------------------------------------------------
> > Ed Delaney edelaney@sctcorp.com (work)
> > or edwardd@earlham.edu (everthing else)
> > http://www.earlham.edu/~edwardd
> >
> >
> >
>
>
>
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Message is in Reply To:
 | | Re: Help needed reviving my HB
|
| Hello Edward and everyone, There are several causes that the Handyboard won't boot. 1) 62256 SRAM was dea 2) 74HC244 was dead 3) The Handyboard cannot put into bootstrap mode You can try to do the followings: Removes all the ICs on Handyboard except (...) (25 years ago, 2-Nov-99, to lugnet.robotics.handyboard)
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