[Canberrauav] 2nd pandaboard dead
Andrew Tridgell tridge at samba.org 
Sun May 13 19:30:31 EST 2012 

Hi All,

Unfortunately it looks like our 2nd pandaboard is now dead.

Jack and I were working on the Mugin today, and started to get all of
the cabling and fitting of components sorted out. As part of that we
took the UBECs from the Telemaster, tested that they were producing the
right voltage, and used them to power the pandaboard and network switch
in the Mugin.

When we switched it on, the pandaboard lit its red LED (which we now
know means over-voltage). It didn't boot so we put a multi-meter on
various connections and found the pandaboard was at 12V. We immediately
disconnected and examined each of the parts and found the castle
creations UBEC from the Telemaster was giving 12V, not 5V. This is
despite us having tested it a few minutes earlier and confirmed it had
been giving the right voltage.

The pandaboard still boots, but all its USB ports are dead. The ethernet
adapter does come up but nothing else. That means it can't connect to
its SSD for the root filesystem.

It case its just USB bus power that is dead, we've tried powering the
USB bus separately, both by using a powered hub and by using a USB cable
modified to give 5V from another source. Using the pandaboard
diagnostics SD image I can see the USB bus, but only the host
controller, hub and ethernet adapter show up. No other USB devices
show up.

One notable thing is that some of the pandaboard chips run very hot
now. Perhaps the 12V caused a short?

Stephen, I believe you've ordered a Pandaboard ES? Do you know when that
is due to arrive?

Anyone else have another pandaboard?

Cheers, Tridge

[Canberrauav] Pandaboard Update
Stephen Dade stephen_dade at hotmail.com 
Mon May 14 21:45:08 EST 2012 

Hi all,

We received the Pandaboard ES today, and spent a few hours this evening
setting up the board with Tridge.

There was some trouble with the SD card not booting correctly. This was
fixed by re-installing the bootloader onto the SD card (but the original
Pandaboard working fine with the card for some reason.). We're at the stage
where the new Pandaboard should be flyable this weekend.

Andrew (Moss) - if you could bring along those spare Pandaboards to the MHV
meetup tomorrow night, we can organise potential sharing of the boards
between the teams.

Thanks

Stephen

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