Pressing the shutter has no action or catch. Removed the battery but seems new. I doubt there's any sort of electronic action. From the manual it seems like the electronics is just for a light meter and optional flash.
Read through this 3-part tear down and repair. They weren't able to find the culprit, so I may be in over my head https://simonhawketts.co.uk/2016/04/26/singlex-tls-strip-down-and-repair-part-1/