[time-nuts] Re: Symmetricom S250 Freeze-Up

[Wilko Bulte]

Bit of a blind guess: older unit, with over time degraded power supply? Typical failure scenario for (SM)PSU are electrolytic capacitors that have lost (part of) their electrolyte. Which means capacity of the capacitors goes down the drain.This can be temperature dependent, making the unit work while cold, fail once warm, work for a bit after being allowed to cool down for some time, etc.

best,
   Wilko

> On 26 Jul 2025, at 17:15, Adam Zeloof via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Hi all,
> 
> I picked up a Symmetricom S250 NTP server last weekend, and I'm having some
> trouble with it. When powered, it'll run for a couple of hours before
> freezing up. The LEDs on the front all turn red, the screen stops, and the
> web interface is unreachable. I've tried factory resetting, upgrading from
> the originally-installed 1.26 Firmware to 1.36, and installing a new CF
> card. If I reboot after a freeze, it usually freezes again within a few
> minutes unless it's sat for a while. Any ideas or solutions would be
> appreciated!
> 
> Thank you,
> Adam
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