I'm sorry about the issue. Please try the following fix:
Please reply at the box below to continue troubleshooting. Thank you.
Sorry, can you please watch the video instructions at the website below, just to make sure:
Please let me know. Thank you.
I'm sorry, if you put back the old toner, what happens? Thank you.
Can you please put back the old toner, then do the steps again with the old toner installed, then what happens? Please let me know. Thank you.
Sorry, can you please disconnect power cord from printer for a minute, then reconnect, then turn on and try the steps again. Maybe this time, press the GO button for 7 times. Please let me know. Thank you.
Is this the original Brother toner? Thank you.
I'm sorry; it's strange as that's the reset method. I'm out of suggestions, but let me open the issue to other experts. Please do not wait; you will get an email message when there is a reply from another expert. Thank you for your patience.
I'm the tech; so I'll have our customer service email you; you can always reply back if you have any concern. Thank you.
Please do not rate. You will get an email when there is another suggestion / reply from another expert. Thank you.
Hello my name is***** do not rate until we are finished. I look forward to assisting and am very sorry to hear that you are having this problem. Is the toner you got from amazon a genuine brother or a "compatible" TN450?