Thanks to everyone for their replies.
If I want to replace the laser assembly does the process involve any soldering?
The only soldering is to remove a point of solder blob from the new laser, you dont need solder skills to do that, just a cheap solder iron, If you decide to replace the laser just order an OPTIMA 6s from over seas supplier like Aliexpress, they are cheap and installation is very easy, also you can order the complete laser assembly from Aliexpress and just to take the old one out and put the new in.
Please note I mentioned Aliexpress because it is the supplier I use, but I am sure there are many suppliers out there as the OPTIMA 6s is a common laser pickup.
Best Regards.