resurrected XO-1.5, died again

[Yioryos Asprobounitis]

----- Original Message -----

> From: James Cameron <quozl at laptop.org>
> To: Yioryos Asprobounitis <mavrothal at yahoo.com>
> Cc: OLPC Devel <devel at lists.laptop.org>
> Sent: Monday, July 1, 2013 11:02 AM
> Subject: Re: resurrected XO-1.5, died again
> 
> On Mon, Jul 01, 2013 at 12:53:47AM -0700, Yioryos Asprobounitis wrote:
>>  I do not know for how long the "toasted" [1] XO-1.5 boards worked
>>  but my "oven baked" [2] board died again after 8 months of daily 
> use
>>  and a guestimated 400+ hours.  I do not know if this is long enough
>>  to justify the process (roughly half a school year worth, I would
>>  guess), but I thought to record it just the same.
> 
> Good data, thanks.
> 
>>  The XO-1.5 is by far, my favorite of the 3 models I have (1, 1.5,
>>  1.75).   Does it make any sense (safety considerations aside) to
>>  retry it?
> 
> It makes as much sense as it always did, I think.  Given that you
> can't change the composition and position of the metals, the problem
> might still come back.

I guess what I'm asking is that the original board was good for more than 2 years. After the reflow, lasted 8 months.
Is a second reflow likely to last 8 months or 8 days (if at all)?
Thx