My Nikon F2 with Dp-1 viewfinder recently stopped working, it used to work years ago. It was stored properly without battery, recently I put in fresh batteries, and meter has no movement. I tested the battery terminals on top of the camera with multimeter, it has 3v measurement, so I know power is delivered to the DP-1 finder. Then I pressed battery check button, meter needle has no movements. I researched online, and found the adjustment and cleaning procedure document, tried to follow it to clean the ring resister and everything, still not working. Any idea how I can diagnose the issue? Looks like some where there is open circuit, or you guys think the meter is completely toasted. Thanks!