Cameras not working on XO-1s

[Christoph Derndorfer]

Hi again,

this may sound like a stupid question but how would one go about swapping
out the camera modules?

I couldn't find any instructions on the wiki on how to actually remove the
motherboard from the chassis (probably one of the few things I have never
done on an XO so far). That step seems necessary in order to access the
module because from the front the white plastic piece makes it barely
possible to see the cable and push the connector in place with a small
screwdriver.

Cheers,
Christoph


> On Thu, Jan 31, 2013 at 11:21 AM, Christoph Derndorfer <
> christoph.derndorfer at gmail.com> wrote:
>
>> James, Gary, Wad,
>>
>> thanks a lot for all your input and the information.
>>
>> We now checked all the XOs which showed these camera problems and all the
>> connections seem to have been fine. So I assume that what we're seeing is
>> really the cable failure which Wad mentioned. Unfortunately my Internet
>> connection here at the library is so sporadic right now that I can't
>> download the PDF attached to #10148 but I'll try it again later today. Not
>> sure whether I have the time to still add tape to all the camera modules
>> tomorrow but I'll see what I can do.
>>
>> Cheers,
>> Christoph
>>
>>
>>
>> On Thu, Jan 31, 2013 at 3:39 AM, John Watlington <wad at laptop.org> wrote:
>>
>>>
>>> On Jan 30, 2013, at 3:02 PM, Christoph Derndorfer wrote:
>>>
>>> > Hi again,
>>> >
>>> > another issue we encountered during today's workshop session was that
>>> on 3~4 XO-1s the camera didn't work (all machines are running 12.1.0 with
>>> the associated firmware).
>>> >
>>> > The effect in Record is always the same: a grey still image. However
>>> when running the hardware self-test 2 of the machines passed the test even
>>> though the camera output on the display was total noise. With the other
>>> machine or two the self-test failed.
>>> >
>>> > Since I've never seen issues with the camera before I was wondering
>>> whether there was anything we could try beyond verifying that the camera
>>> connector is in place (as described at
>>> http://wiki.laptop.org/go/XO_Troubleshooting_AV#Errors_communicating_with_the_camera
>>> )?
>>> >
>>> > Thanks,
>>> > Christoph
>>>
>>> Oh, dear.   You might have run into a failure of the camera flat cable.
>>>   We changed the mainframe
>>> in 2010 (IIRC) to fix this, and there is a simple preventative measure
>>> to prevent it from happening
>>> on older machines (adding two pieces of cellulose tape to the right
>>> place on the motherboard.)
>>> Details and the fix are at http://dev.laptop.org/ticket/10148
>>>
>>> As someone already pointed out, please try replacing the camera assembly
>>> --- it is the quick
>>> way to see if this is the camera or the motherboard.
>>>
>>> Regards,
>>> wad
>>>
>>>
>>>
>>>
>>>
>>> > --
>>> > Christoph Derndorfer
>>> >
>>> > volunteer, OLPC (Austria) [www.olpc.at]
>>> > editor, OLPC News [www.olpcnews.com]
>>> > contributor, TechnikBasteln [www.technikbasteln.net]
>>> >
>>> > e-mail: christoph at derndorfer.eu
>>> >
>>> > _______________________________________________
>>> > Devel mailing list
>>> > Devel at lists.laptop.org
>>> > http://lists.laptop.org/listinfo/devel
>>>
>>>
>>
>>
>> --
>> Christoph Derndorfer
>>
>> volunteer, OLPC (Austria) [www.olpc.at]
>> editor, OLPC News [www.olpcnews.com]
>> contributor, TechnikBasteln [www.technikbasteln.net]
>>
>> e-mail: christoph at derndorfer.eu
>>
>>
>
>
> --
> Christoph Derndorfer
>
> volunteer, OLPC (Austria) [www.olpc.at]
> editor, OLPC News [www.olpcnews.com]
> contributor, TechnikBasteln [www.technikbasteln.net]
>
> e-mail: christoph at derndorfer.eu
>
>


-- 
Christoph Derndorfer

volunteer, OLPC (Austria) [www.olpc.at]
editor, OLPC News [www.olpcnews.com]
contributor, TechnikBasteln [www.technikbasteln.net]

e-mail: christoph at derndorfer.eu
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