It definitely needs a recapping. That noise is the Hard Drive as these powerbooks did not have fans.
Q: No Smiley or Sad Mac? Could be bad boot blocks. Create a boot floppy disk with the 165 and try it out on the 160.
Q: No Smiley or Sad Mac? Could be bad boot blocks. Create a boot floppy disk with the 165 and try it out on the 160.