I just bought a used 2900XL.Dont know passwords, I tryed the Cisco passwords reset method. Doesnot work because there are no files in the flash directory.Help pleasedale

I just bought a used 2900XL.Dont know passwords, I tryed the Cisco passwords reset method. Doesnot work because there are no files in the flash directory.Help pleasedale

I purchased a used 2950-24 router, but I didn't get the admin password. Is there any way to reset this?