Changed batteries for kettler coach LS but still the display doesnt work

If you've changed the batteries in your Kettler Coach LS rowing machine's display unit and it still doesn't work, there could be a few potential issues causing the problem. Here are some steps to troubleshoot:

1. Check Battery Orientation: Ensure that the batteries are inserted correctly with the correct polarity (+ and -). Sometimes, even if the batteries are new, they may not make proper contact if they're not inserted properly.
2. Inspect Battery Compartment: Look inside the battery compartment for any signs of corrosion or damage. Corrosion can prevent proper electrical contact and cause the display unit to malfunction. If you see corrosion, clean the contacts with a cotton swab and some rubbing alcohol.
3. Test Batteries: Even if the batteries are new, they could be defective. Try testing the batteries with a battery tester or multimeter to ensure they have sufficient charge.
4. Reset Display Unit: Some electronic devices have a reset function that can help resolve issues. Try resetting the display unit according to the instructions in the user manual. This often involves holding down a specific button for a few seconds.
5. Check Power Connection: If the display unit is powered by an external power adapter, ensure that it's plugged in securely to both the display unit and the power outlet. Test the power outlet with another device to ensure it's functioning properly.
6. Inspect Display Unit: Carefully inspect the display unit for any physical damage, such as cracks or broken connections. Damage to the display unit itself could be preventing it from functioning properly.
7. Contact Customer Support: If you've tried the above steps and the display unit still doesn't work, it's possible that there is a more serious issue with the unit. Contact Kettler's customer support for assistance. They may be able to provide further troubleshooting steps or arrange for repairs if necessary.