Yes, you can put a laptop in ecoATM. However, there are a few things to keep in mind. First, make sure that the laptop is turned off and unplugged. Second, remove any batteries from the laptop. Third, place the laptop in the ecoATM machine with the screen facing up. The machine will scan the laptop and determine its value. If you're happy with the offered price, insert your cash or debit card into the machine and follow the prompts to complete the transaction.