For one of our customers this was recently due to the defective seesaw. This is a spare part which is unfortunately no longer manufactured. The HORIZON MAC-8 is a bit older model – but still generally reliable.
We simply recreated the missing spare part and the tower is running again.
If you have such a special case and need support, please let us know.
You can find available spare parts from Horizon in the Horizon GmbH webshop. Some parts have to come from Japan, which of course takes a little longer.