Not much out there, as I am sure you will have seen when you did a search fo ryourself.
In case you couldn't have been bothered, I found these:
https://www.avforums.com/threads/lg-drt389h-dvd-recorder-problems.1162867/
http://pvrandharddiskrecorders.everyproblemsolved.co.uk/181/-/1/
XXXXX
October 2015