Tushar B

Distinguished
Feb 3, 2012
1
0
18,510
Hello,
My CPU is not getting onn. Starts but again switch off. ans when open CPU the green light is on of motherboard.
Switch on from CPU ihe fans run for few sec and again stops.Kindly suggest me the issue. and how to resolve
 
Either it is a faulty motherboard or faulty power supply.

Easy test is with a alternative power unit, plug in the CPU and MOBO power and see if you get a boot. If a test PSU doesn't work then you have a dead motherboard.

You can alternatively go through the tedious endeavor of uncabling and re-cabling, re-seating the RAM, CPU and fan, but the likely outcome is one of the above.
 

randomkid

Distinguished

Is it a previously working PC or did you just built it & turning on for the first time?

If previously working, there are possible reasons:
1. You CPU FAN has failed & processor is overheating so it turns itself off.
2. defective Power Supply.

If you just built it, check if you have connected both the 24PIN power connector & the 4PIN power connector. Both should be connected for the PC to turn on.

Give us more information as to what situation possibly led you to this problem. This way, we can help you better.