In September 2019 we bought two laptops and two Dell Business Thunderbolt Dock TB16 with 240w adapter. Computers are fine. Both docking stations no longer work. One in May 2020 and one in June 2020. As they were bought 'new' they should still be under warranty. I called but couldn't reach anyone. I left a message a few days ago but didn't get a call back. I called Dell to get a replacement. According to Dell, the one-year warranty expired in May 2018. That was 1 year and 4 months before we bought them. So they were either used or very old that were sold to us as new and current. I am very disappointed that they did not take our call.
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