Why does the projector do nothing when it is powered on?
Since there is no response after the projector is connected to the power supply, it means that there may be a problem with the power supply part of the projector, but is there a problem with the internal power supply of the projector or the external power supply?
To do this, you should first check whether the external power supply specifications of the projector are the same as those required by the projector, for example, if the external power socket is not grounded or the power cable used by the projector is not supplied with the projector. It may cause abnormal power input to the projector.
Once it is confirmed that the external power supply is normal, you can conclude that the internal power supply circuit of the projector is damaged. At this time, you can only replace the internal power supply of the projector with a new one.