Follow the BenQ guide, if you cant dump the drive it will be a LiteOn. If so and you not confident to do LiteOns send it to someone to do for you, if...
XGD3 Quality Benchmarks (per TX and C4): PI MAX should be 100 or less & PI Average should be 5 or less
PIF MAX should be 4 or less & PIF Average should be 0.20 or less
Nero Discspeed score of 90 or better.