Gary Jordan

 Today I purchased a 2430A from a flea market. Upon powering it up, it began its self testing and every test passed.
Next, I pressed the Menu Off button below the screen to exit the menu and it wouldn’t exit. I then went to YouTube to watch videos to see what I was doing wrong. In all of the videos, pressing that button indeed exited the menu screen. 
 Could someone please steer me in the right direction to correct this issue? Thanks in advance, Gary