Dell notebook win7 system optical drive does not read the disk how to solve

Dell laptop power supply causes the optical drive does not read the disk failure reason analysis:
1, may be the motherboard problem;
2, some accessories contact bad or data line has Problem;

3, power problems.
Workaround:
1) After replacing all the accessories except the CPU, power supply and chassis, the replacement method is used. If the fault persists, the only suspicious place is the power supply.
2) Continue to use the replacement method, change to a new power supply check, the fault phenomenon disappears, and the power supply is insufficient after adding an optical drive, only the power supply is replaced or the optical drive is not installed.