TDK discs are not the very best, so I suggest to try with a proven quality disc like Verbatim. Are you sure that the TY discs you tried are genuine? What brands are these TY discs?
Just to exclude a software problem, you can also try to run a test with ImgBurn (the very best burning software available in my opinion, and it’s also free )
Try also to disconnect the other drive and leave the LG only on the machine.
Some users complained about the LG drives being picky about the PSU. Some low-cost PSUs, in fact, are not able to provide an enough stable power supply to make the drive work correctly. What PSU do you have?
The definitive test to check if the drive is damaged, however, is to installing the LG on a different machine,. If also in the other computer the same problem is still present, then the drive is damaged