Couldn't find the owners manual for that receiver online and it has a boat load of buttons.
Make sure that the speakers themselves work.
Set the receiver to stereo and connect speakers to the A speaker terminals. Some receivers won't work on A+B unless you have four speakers connected. Use a source that you know works.
There may be internal or external speaker fuses on that receiver. You can find the service manual here https/www.hifiengine.com/manual_library/kenwood/kr-v127r.shtml
which should show you the location and value of these fuses. If you replace fuses always use the same amperage and type of fuse (fast or slow blow). If you replace a fuse and it blows again don't keep trying. That can make the damage worse.