1, how to determine the laser damage: laser damage generally is not read disk or disk is very difficult, some quality almost CD cannot be read, in the case of equipment can normal recognition to the machine, are generally the problem of laser, when this situation you just need to disassemble the machine to check the laser model, to buy the corresponding models of baldheaded installed, machines, it will be like new again.
How to open solder joints: laser in the factory, to prevent electrostatic damage to the laser tube, usually equipped with protection of solder joints on printed circuit boards (in the bald head or on the soft row line has a larger solder joints) of short circuit, the power of laser tube feet in bald before installation should be conducted with antistatic soldering iron welding, soldering iron is heated to about 350 degrees Celsius, disconnect the power supply, open guard point after welding, otherwise the laser will not be able to use
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