|Your suspicions are correct. The replacement companies can't reverse engineer the chips in the print head. So, depending on the brand you may or may not be able to use third party supplies. In the case of toner cartridges the cartridge may need to be reset. |
I just bought my wife a Nook ereader. I bought last years model, which holds a microSD card for expansion. You would think that is a good idea wouldn't you? Well this years model has no SD slot. Why, so you can't root the unit, which runs on Android, so you can read any file, instead of only Barnes & Noble files. This is to force you to buy media from ONLY them.