New laser (hop 141) not reading(statblob removed)

Bought a new replacement laser from amazon installed it and it does not read disks of any kind (media/games/B/ups). After testing with my meter it gives a reading of 3.4 (i'm led to believe this is low fromt tinternet:)

Should i just send it back for a replacement or tweak the pots as its so low anyway? I dont fully understand how the lasers work i am guessing that you are adding extra juice to the laser to make it more powerful?

Thanks in advance

Gazz