I'm trying to play with CD4026BE counter and I'm unable to solve the problem with reset pin (15 according to datasheets and numerous examples). In my case, if pin 15 (reset) is grounded with the wire, the counter works perfectly. Otherwise this pin outputs (!) 5V voltage! If it is grounded, through this pin flows a significant current of 50mA, which is way too much in my opinion. Any resistor between this 15 pin and ground, as suggested everywhere, keeps high voltage on this pin and prevents the counter from counting. I'm at a loss, since in every example I see, people send HIGH signal on pin 15 to reset it, but it is already high in my case. I've searched "4026" questions here with no result. Indeed, no evidence of a similar problem. Could i have missed anything (quite possible, since I'm only starting to learn electrical engineering)?
I see one of two possibilities.
1) The ground pin of the chip is not connected to ground. Check that pin carefully to make sure that it actually goes to your power supply (-) terminal.
2) The chip is faulty. The reset pin might have seen an over-voltage excursion which destroyed the internal protection diode between the pin & Vdd. Your only option in that case is to replace the chip.