This is very common problem so no need to worry. This problem normally happens due to the improper paper-thickness lever setup or too much slack in the ribbon or the cartridge is not properly installed. So chek paper thickness lever properly and remove all the slack if there is any in the ribbon or just reinstall the cartridge properly. If these things are not worked then you needed to take help from the Epson support team. They will definitely give you the best solution but if they feel any technical issue then you have to take your printer to the service center of Epson.
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