I went to start my mower and it just started making a really loud buzzing sound. I couldn't turn the mower on and couldn't get rid of the noise. Had to just let the noise happen until it died down. I'm assuming the battery ran out. Still won't start.
Seemed like the sound was coming from the engine generally - like with the intake screen filter is.
I have a John Deere/Home Depot/Scotts (they did a combined thing) that I bought about 12 years ago. Its the L17.542