MY PRINTER IS STUCK ON FAX WHAT CAN I DO TO FIX IT

try these
https://fixmyprinter.us/turn-off-fax-on-brother-printer/
Delete the faxes stored in my Brother machine's memory.
https://support.brother.com/g/b/faqend.aspx?c=id&lang=en&prod=mfc9120cn_all&faqid=faq00002827_001

Does it print?

Make and model printer? We might be able to help if we knew....

There is a scan mode, but not a print mode. If this is what you mean. You may have a stuck fax button or operation panel.

Very likely you have some paper stuck in the printer. Try to lool for it and remove the stuck paper

I had the same problems some months ago. I only solved it when I deleted the printer settings from my computer and reinstalled the software, making sure that I installed all the components from the CD. Also make sure that the printer is on fax default setting when you are using it as fax. You can check this by going to My Computer then Control Panel, then choose Printers and Other Hardware then choose Printers and Faxes. You can then set as default hp Officejet 5500 series fax. Hope these suggestions help.

sounds like the faxes are stuck in memory
look in the Troubleshooting section of the manual

http://www.retrevo.com/support/Brother-FAX-4100-Fax-Machines-manual/id/386bh847/t/2/

try unpluging the power from the fax machine/

Sounds like switch inside operations panel has broken, there is no reset that will fix it, will need new operations panel.

the reset code on this machine is menu # 2 8 6 4 then maintence shows enter 99, the first bit must be done super quick.