Hello,
Unfortunately, this was too far gone and I lost this battle. I was able to get the mirror mechanism unstuck and latch in place. I was also able to get the shutter to open both curtains but without any type of control. I also got the meter to work! That means all my 10 or so desoldered and eventual resoldering joints worked. But there were tiny broken parts inside, dislodged tiny springs and I suspect there might have been missing bits. My suspicion is that despite not showing any visual signs, somehow this camera may have fallen or taken a good hit.
soldering everything back together
But not all was lost. It was a fun learning experience and soldering practice. I'll put everything back together and clean it as a display unit. So my non working MV1 will now have some company in the "All Show No Go" shelf.
Thanks,