Generally there are the following three possibilities:
1. The current cash drawer is usually connected to the printer. If thermal receipt printer does not print the ticket, the cash register will not open naturally;
2. The cash box is connected to the POS (ie the host) Specially added a conversion card to the cash box), the pos card is not in good contact with the motherboard, or the card has a problem;
3, The problem of pos cash drawer itself, if it is a new money box, some have a bubble inside, must be If the bubble is taken out, if it is an old one, it may be a problem with the spring.