An XO on its last legs?

[Tiago Marques]

On Tue, Nov 30, 2010 at 2:11 AM, John Watlington <wad at laptop.org> wrote:

>
> The symptoms you describe (power light and Mic light coming on, but nothing
> else)
> indicates that the main processor isn't executing any code.   This is
> usually caused
> by one of two problems: corruption of the SPI ROM containing the boot
> loader or
> a cracked solder ball underneath the processor.   I doubt it is the former,
> as once it
> died it wouldn't restart.
>
> You can test for the latter by pressing down on the processor (biggest chip
> on the
> board) and seeing if it improves the situation.   Unfortunately, it is
> impossible to fix
> this in the field.   It requires reflowing the board again.
>
>
Not exactly, although the fix isn't 100%, he can try to heat it up with a
heat gun at some electronics repair shop. It worked with Xbox 360s, which
are plagged by the same issue, even though it sometimes isn't a definitive
fix.
Then again, can you even successively reflow it with the epoxy around the
chip?
Out of curiosity though, is this a problem that plagues more XOs or has the
solder's chemistry been worked out?

Best regards,
Tiago


> Bummer,
> wad
>
> On Nov 29, 2010, at 9:00 PM, Snow Wolf wrote:
>
> > So of late, I've been wondering if my XO is approaching total failure.
> Help me judge, based on these symptoms::
> > When opening and booting the laptop, the power light and light in top
> left will come on... nothing else. Child boy needed to get it working.
> > Occasionally opening the lid  the same state as before will occur.
> > Recentaly, a black screen freeze occured during startup.
> >
> > So I'm fairly sure it's an origianl XO-1, but ive upraded it to 802 along
> the way. What must I do to get it working well again?
> >
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