Halo,
I read your posts because I have a similar problem. First sorry for writing English, maybe you will understand Serbian better.
I have a problem with tree Samsung ML-1660 printers. They used a some Chinese toners, and after a few pages printed all of them are blocked. I get only a red light, and message from Smart panel "Toner cartridge is not compatible. Check users guide". I used a new, Samsung brand toner and still get a same message. Also I can't print demo page & configuration sheet. All I can get is a Supplies Information Report. In it, Total Page count is blocked to 2037, and everithing else about toner is "Not Support".
I try to write a new firmware, found on this forum, but I can't get a Orange light after downloading it to device. Also i try to make a firmware with device serial number, but also can't download it to device.
Maybe some of you have a solution. I do not know what to do.
Thanks, and regards from Serbia.
