What is this PSW1 part on a circuit board? Trying to fix a Canopus ADVC-300 DV/VHS Converter

[gizmo1990]

I'm trying to fix this Canopus converter so that I can convert lots of old VHS cassettes. The problem is that it turns on for a split (and I mean split!) second, the fan jerks and then.. nothing. I've checked the power brick works. I've opened up the converter itself and been testing for shorts.



The image attached shows the on/off switch (which I've checked works) to the left of the yellow socket. Below the yellow socket is a green block marked 26 with a strange symbol at the front. Putting my probes either end of this block, on the silver parts, gives an open short signal. Since I dont know what this component is I don't know if its actually a short or if this is normal? Does anyone know what this part is and can tell me if this might be the issue?

Also, if anyone has any ideas what might be causing the converter to not start in the first place, I really appreciate any suggestions!

Thanks a lot.

[stj]

ffs.
power switch.
not the best term for a self-resetting solid-state fuse.

[redwire]

Polyfuse or polyswitch they get called, so PSW makes sense to me.

[gizmo1990]

redwire Thanks for that, I'd not heard the term before. After reading about them I gather that they would be very conductive at normal temperatures? Hence why the one on the board appears open when I probe it. It only becomes resistive with a large electric spike. So my search for a short continues I guess.