If TFTP is failing, place the c1900-universalk9-mz.SPA.157-3.M9.bin file on a USB stick (FAT32), plug it in, and use boot usbflash0:c1900-universalk9-mz.SPA.157-3.M9.bin .
Is your router currently displaying a or a ROMMON prompt ? C1900-universalk9-mz-spa-157-3-m9-bin Fix Download
: Document the expected downtime during the reboot phase. If TFTP is failing, place the c1900-universalk9-mz
If budget is tight, a used 1941 with M9 is still viable for: If TFTP is failing
: Avoid downloading this file from third-party "free download" sites or public Google Drive links, as these versions may contain unauthorized modifications or malware.