Thanks to all who replied. Turns out it was the cap in the PSU (3,300uF 10v). I replaced it with a 3,300uF 16v and all seems well.
It was a bit strange because I had already checked the PSU with a multimeter and all rails read fine. It wasn’t until I put a ‘scope on the supply rails out of interest that I noticed the 5v rail had a massive high freq ripple on it (I guess from the switch mode osc). Anyway it’s back up and running now. Thanks again, Chris > On Thu, Sep 24, 2015 at 1:21 AM, G1FEF <li...@g1fef.co.uk> wrote: > >> Do we have any Symmetricom experts on this list? >> >> I've had a Symmetricom Syncserver S200 GPS+PPS with rubidium clock running >> for several years until we had a power cut and the UPS battery failed, on >> powering back up it won't boot at all. >> >> I suspect the flash is corrupt but they protect it in some way, so one >> can't just copy the o/s onto a new card, and the company want ££££'s to fix >> it for me! >> >> Thanks in advance, >> Chris >> >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.