Our Mistake In Repair
You will not be surprised if there are more problems after you have start troubleshooting the set. The reason behind it is simple-our own mistake. Here are the list of the mistakes:
1) Did not connect the power supply to load. Some power supplies need a good load to operate. Without the load, there could be over voltage and this could burnt some of the components in the power supply itself.
2) Accidentally drop some solder or even small screws on circuit board. If this happened, the circuit board components could get burn.
3) Did not plug in the connector after you have removed it for checking. One good example is the Yoke coil connectors in the CRT equipment. In some designs, the HOT will be destroyed immediately the moment you turn the set on.
4) Solder bridge on the component’s leg. You could have accidentally shorted the components pins when you were doing the soldering work.
5) Did not install the component properly. You could have installed the electrolytic capacitor the other way round causing the capacitor to explode when the set was On.
6) Did not use original components. A substitute or replacement part number don’t always work. Sometimes an equipment could only function well when you put in the right and original components
You may be wondering why after replaced the components, the set would still not be function. Always track back the last action you have done on the set before you replace the component. If you could spend 1 hour on troubleshooting and repairing the equipment, why not you spend another 5 minutes just to double check everything before you turn the set On. The good practice is always double check you work so that you would not regret later of causing more problems to the set than you can solve.