The reasons and solutions for the computer booting up and the monitor not responding are as follows:

Check whether the power cord on the host computer can be energized normally.

This type of problem often occurs in the computer host and monitor often move the computer, it is recommended to change a new power cord to try, or the power cord to change the outlet socket to try, the monitor's power cord and the host's power cord to the right, so you can try to find out is the cause of the power cord or what the reason. Some monitors default to power-saving mode, if the time is long, the monitor will automatically shut down. So find the monitor switch on the monitor and make sure the monitor switch is on.

The cause of the monitor itself.

You need to take it to the relevant monitor maintenance point for repair.

Dust inside the main chassis

After disassembling the main chassis, if you find a lot of dust inside the chassis or it is not clean, it is recommended to clean the dust. If conditions permit, you can use a large hair dryer (or a device with a large wind force) to blow directly into the interior of the chassis to blow the dust inside the chassis directly clean. If there is no oversized hair dryer can use some small brush and other tools. Slowly the dust inside the chassis slowly sweep out and then directly with the mouth can also be blown off.

Inside the case of the CPU fan

If the CPU fan does not rotate at all, then check whether the power supply fan is rotating, if the case of the power supply fan does not rotate at all, it means that the external power supply socket is not power or the cable is bad. If you are sure that the socket is not bad, then check whether the switch on the chassis is connected to the motherboard POWER or RESET cable is inserted correctly! Specifically, you can refer to: motherboard front panel plug cable insertion method Generally not plugged wrong, but can not rule out this problem, although less likely. Or the power supply itself has been bad, burned the problem.