So had the batteries out of my nh for about 10 days while I had a new battery cable made. Normally when the engine starts there is a short 2 or 3 second beep while the hydraulics pressurize or whatever. But now it's just one long constant beep that won't stop. Occasionally stops but as soon as I press any button that has a beep it stays on again. Any suggestions anyone? No dash lights on and everything appears to be normal. Could this have something to do with my battery being disconnected?