Hi, My drive is also the GGC-H20L, I made a typo in the post
I contacted LG, explained the issue and told them that I had tried uninstalling the drive via device manager then replugging in, no difference. I told them it happens 4 out of 5 times I boot, but sometimes it boots correctly. They said it was a drive fault and gave me a huge ID number for my case and said that in the first year I needed to goto my retailer (Ebuyer for me in UK).
I submitted an RMA case with Ebuyer and quoted them the ID that LG gave me, I then had to call them for authorisation and now they have sent me an email to arrange collection. They say they will take it back, check for the fault and if they confirm it they will replace.
Just out of interest what motherboard do you use, and what BIOS version? I am using a Gigabyte 780G board with v10 BIOS.
Le tme know how you get on …