A different kind of scroll wheel problem G603 : r/LogitechG
G603 scroll wheel suddenly turned into hot wheels. Sent it in for warranty, they said it's working fine? I waited 1 whole month for this, and now I'm getting it back broken. :
Fixing the "reversing scroll wheel glitch" on Logitech g603, - logitech post - Imgur
Don't throw that mouse away! Fixing scrolling issue on Logitech G703, G502, G503 etc. mouse. - YouTube
Logitech G603 scroll wheel malfunction fix (FREE)Works on G703, G305, G103, GPro, G403, G203, & more - YouTube
Repair Parts Mouse Encoder Wheel Scroll Click Switches Board for Logitech G603 Mouse Wheel Board - AliExpress