Old gsa 4166b firmware

I am trying to revive this drive and want to flash V 1.00 back onto it and then back to the last one. It runs cd’s, cdr’s just fine but when it comes to dvd’s it’s a no go. No read or writing. I do not know the current FW on it (the label is gone) The only tool I know of that will force flash is from the 1.00 flash tool from LG and cannot find it anywhere. Could anyone help or any ideas? Thanks

I do realize it’s an old drive. If this doesn’t work it’s not a big deal.

Then the dvd part is dead. No way to get it back.