<p>I was interested in trying medium format photography, so I purchased Bronica SQ-Ai from a Craigslist seller. IT came with depleted batteries (no leaks), I've installed new ones and at first it kind of worked. If I pushed on battery check light button red LED was lighting up.<br> I switched it to multi-exposure mode and cocked the shutter, however pushing the shutter button didn't release the shutter, was just lighting up the same LED. I removed the lens and re-attached it and shutter started to work. I was happy :)<br> <br />Next day it stopped working :( Pushing battery check or shutter buttons didn't light LED and didn't release the shutter. I measured batteries that I took from the camera and they were reading fine 1.5v, still replaced them with four new ones - nothing.<br> Tried to clean all exposed contacts in battery compartment, on the prism finder, back, lens and on the lens connector with alchohol. Still nothing.<br> <br />Any ideas what might went wrong? Or how to attempt fixing it?<br> I've seen people mentioned here that they found repair manuals online, my googling only found ETRSi repair manual here: http://butkus.org/chinon/bronica/bronica_etrsi_repair_manual/bronica_etrsi_repair_manual.htm</p>