[time-nuts] Dead Thunderbolt Explored - Any Chance of Resurrection?

[Jean-Louis Oneto]

Hello,
Last time(s) I found similar symtoms (in somewhat different equipments), the 
main culprit was a tantal capacitor failed in short-circuit mode. It could 
be worth a check...
HTH,
Best regards,
Jean-Louis

----- Original Message ----- 
From: "Hal Murray" <hmurray at megapathdsl.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Sunday, November 28, 2010 8:13 PM
Subject: Re: [time-nuts] Dead Thunderbolt Explored - Any Chance of 
Resurrection?


>
>> 1.  Is it likely that the FPGA is the culprit or just the victim of 
>> another
>> failure?
>
> It could be getting hot trying to drive some signals while some other chip 
> is
> driving it in the other direction.
>
> You might poke around and see if you can find any signals that aren't at a
> clean high or low.
>
> Or look for signals that are shorted to Gnd or Vcc.  Maybe add a few mA of
> load and see if they shift a bit.
>
>
>> 2.  What is the likelihood of repair?
>
> My guess would be low, but what do you have to lose if you feel like 
> trying
> something?
>
>
>
> -- 
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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