New to us 1910 430 TBH cart. Got into the field today and we are having problems with the meter clutches. First time we turned them on and did a test run to check rate and depth and they worked fine. Next time they came on and wouldn't shut off. Played with the monitor and power plugs and they came off but then didn't want to come on. Played with the plugs again and they came on again but won't turn off. I can turn them on and off individually but when you use the master on off no luck. Any ideas?