I agree with Phillipe on this one.  If you pulled the wi-fi card and it
is still rebooting, then it is likely the mainboard.

The output couplers are the typical cap failure point on these.  And
that would not cause this problem.  If you want to take a blind stab
without deeper circuit testing, try replacing the conventional axial and
radial electrolytics.  SMD electrolytics tend to have better seal
integrity than larger conventional types.  The industry service life of
an electrolytic properly spec’ed should be 15-20 years.  But ones
sourced from a lesser quality manufacturer and occasionally even a
top-tier Nichicon or Sprague have been known to fail prematurely.

A complete recap of a classic is not worth the effort, IMO.  The SMD
ones can be a PITA to work with unless you have the right iron and an
experienced touch.  You’re going to invest around $20 throwing parts at
a unit now worth $75, with no assurance of success.   And one with
enough mileage on it to requre a full recap means the display may be
closer to the end than the beginning.

If the unit has had any prior work done on it, double check for cold
joints and overheated/lifted traces and pads.  That kind of flaw can
also cause intermittants and spontaneous reboots.

If you can say goodbye to it and have the funds, the Touch is a
decidedly better player and a more reliable one, IMO.


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