I am working on an MSI A6200 MS-1681. When you press the power button the lights all flash. The fan comes on. The screen comes on and shows the POST screen for a second and then it dies. I have been able to enter the BIOS menu but it still just promptly shuts off. After that it will not start up until you unplug the A/C adapter and plug it back in. It does not matter if the battery is inserted or not.
I have removed all of the components and it still does the same thing. It doesn't beep or show any kind of error on the screen. It just simply shuts off and won't come back. It does not even get far enough to start booting the OS so it must be hardware. I'm pretty sure it is an issue with the motherboard. However, I'm not sure if a faulty DC jack could cause this kind of problem. Wiggling the jack around has no effect on how long it stays on.
The oddest thing about it is that it only starts up once. I've never had a machine do that to me before so I was wondering if anyone on here had experienced it and perhaps even solved it.