My Ortur 2 S2 laser wont turn on

hi there , i did stupid thing and tried to upgrade my Ortur 2 S2 laser firmware and now it wont turn on.
when i press power and reset button it comes up on my computer to put firmware in but when i turn that off it wont power up.
ive started Lightburn and did this to see if Lightburn would see the laser but it says it isnt conected
can i please get some help as it was working ok before this and i dont want have to buy another one.