An XO on its last legs?

John Watlington wad at
Mon Nov 29 21:11:08 EST 2010

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.


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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