HELP PLEASE Liteon sohw-1213s and sohd-167t read problems

both my liteon sohw-1213s and sohd-167t will only read the dvdrs i have burned some of the time. they will work one sec then not work for a while or visa versa.

i guess i would like to update firmware/drivers on both but am new to this with dvd drives

if some one could send me the specific links for each exact drive firmware and maybe guide me through it ,that would be GREAT

im sorry for the “newbie” question but the help would be great
thanks mike