Thanks. I have the manual. it came with the meter.
There is a contrast/f.no switch on the top left side of the meter. When switched to 'contrast' it shows an EV scale and when switched to 'f.no' I believe it is supposed to show an fstop and ev scale, however it doesn't, and none of the buttons work i.e. I can't take a reading, or adjust the shutter, even though the manual says the switch should be on 'f.no'. I can only take readings with the switch on contrast. It may not be a huge concern since I can still take readings in contrast mode, but it's easier for me to read an analog fstop scale than an EV scale, and if it is acting up now there's no telling how much longer it will function.
Directly from the manual:
Ambient Light Measurements ('Time') Mode
Single Measurements
Analog Display Switch (f.no/contrast): F.No
Digital Display Switch (f.no/ex.IN): F.No
Normal/Analyze Switch: Norm
Single/Multi Switch: Single