Hi Steve and welcome back. I wasn't on the list yet when you left.
As to the OM-4T noises. We just had the umpteenth thread on one of the
twin subjects of lock-up and/or strange noises in the last few days. The
strange noises may also come from battery circuit problems.
Here is my post on the subject of OM-4 battery/meter circuits 2 days ago:
________________________________________________________________________
Moose wrote:
Thomas Tonelli wrote:
> Thanks for the suggestion.
>
> The batteries were fine according to the battery check.
>
The battery check is mostly useless for anything but checking which
camera has batteries in it. The battery check doesn't check it under
load and so will beep with pretty much anything in there. The problem is
that (as with all manufacturers' cameras of that era), the batteries are
put under a large load while the shutter is open. In OM cameras, if the
necessary voltage/current to assure an accurate exposure isn't present
when the loads starts, the camera simply refuses to take the picture and
stays locked up until reset. This is the REAL battery check.
Are these really 357 batteries, or some other model which says it
replaces the 357? Battery packages often LIE, and claim that other
batteries with the same nominal voltage and physical size are
replacements for the 357. The 76 and 303 are batteries that will give
the symptoms you describe after they have been used a bit.
Are you sure the batteries are actually good? Many of us have
encountered a case of a bad battery in a new, fresh batch. Not common,
but it can lead to endless frustration if not checked out.
Is the battery circuit clean and tight? The inside contact of the
battery compartment is soldered to a wire and the joint can become loose
or corroded, although it isn't common. The other end of the battery
circuit is more problematic. Since you have a 4T, it likely has a chrome
battery cap, bu it is still worth making sure the threads on cap and
bottom plate are clean. Plain 4s had black painted caps and paint in the
threads was a regular problem. Next, the current has to go from the
bottom plate to the frame. Loose bottom plate screws, dirt, oil, etc on
screws and/or bottom plate can add resistance to the circuit. Make sure
the screw threads and the places where the bottom plate contacts the
frame are clean and tight. Remember, you are dealing with a very low
voltage. Resistance that has little effect on the very low current
needed to operate the metering and battery check may drop the voltage
under shutter load below what is needed.
_________________________________________________________________________________
It could still need pro help, but an amazing number of such symptoms
turn out to be battery related.
Moose
Steve Schaffner wrote:
>.........Now I find
>that my OM-4T is behaving badly when I mount a flash (T-32).
>Intermittently, the camera will start to beep (the self-timer beeping
>sound), and occasionally break into a weird trilling, and the green
>light in the viewfinder starts to blink. If I try to take a picture
>while it is beeping, the mirror goes up for a couple of seconds, and
>the the flash fires. Does this sound familiar to anyone, and is it
>likely to be fatal?
>
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