no power up (MB or CPU issue) [SOLVED]

[barney2x4]

Hi!

I had a H170 MB and it had some problems - it started failing to find the monitor more and more often. It started crashing on boot and at the end could not even find the SSD on that SATA port. I thought it was a MB issue so I sent it back (it has 1.5 years of warranty left). In the meantime I got a 200-series MB (GA-H270-Gaming 3, Socket 1151) but when I connect only the essentials (PSU to MB, no GPU, no HDD, SSD or whatever) it cannot start. When you press the on/off button it starts for half a second, the fans begin to spin and that's it, it stops. On the the edge of the MB there are 4 LED's and one of them (for the CPU) is flashing. The MB is 200-series, the CPU is 6-gen (i5/6600k), it should not be an issue. I plugged and uplugged everything. The CPU fan is properly connected and starts spinning...for 0.5 seconds, like all other fans. It's not a PSU issue either. 

Aside from a bent pin or spilled thermal paste (both of which are not the case) - is there anything else I can try before sending them both for warranty repair? A test with a different CPU is obviously my next task, but that's going to be in the coming days. Any ideas? Is it possible it was the CPU all along? Or is it a faulty socket issue?

[Radium_Angel]

11 minutes ago, barney2x4 said:

Hi!

I had a H170 MB and it had some problems - it started failing to find the monitor more and more often. It started crashing on boot and at the end could not even find the SSD on that SATA port. I thought it was a MB issue so I sent it back (it has 1.5 years of warranty left). In the meantime I got a 200-series MB (GA-H270-Gaming 3, Socket 1151) but when I connect only the essentials (PSU to MB, no GPU, no HDD, SSD or whatever) it cannot start. When you press the on/off button it starts for half a second, the fans begin to spin and that's it, it stops. On the the edge of the MB there are 4 LED's and one of them (for the CPU) is flashing. The MB is 200-series, the CPU is 6-gen (i5/6600k), it should not be an issue. I plugged and uplugged everything. The CPU fan is properly connected and starts spinning...for 0.5 seconds, like all other fans. It's not a PSU issue either. 

Aside from a bent pin or spilled thermal paste (both of which are not the case) - is there anything else I can try before sending them both for warranty repair? A test with a different CPU is obviously my next task, but that's going to be in the coming days. Any ideas? Is it possible it was the CPU all along? Or is it a faulty socket issue?

I'm willing to bet your power supply is bad, it can't sent enough power to the board to power things up.

I'd start there.,...

[Beowulff83]

You could clear cmos, and test with only one stick of ram at a time in different slots. . . although this sounds like its the cpu

[Windows7ge]

Try this. Unplug the CPU 4 or 8 pin from the motherboard. Alternatively remove the CPU entirely. Turn the system on. Does the system maintain a suspended state without powering off? If so the issue is either CPU or PSU related. It's typically easier to find a different PSU than CPU. Try a different PSU with everything plugged in again. If the same issue occurs then you can move your attention to motherboard or CPU.

[barney2x4]

Haha, it's working....and the problem was the stupidest one I have seen.
Different RAM sticks in different slots - nothing.
I cleaned the CPU and applied thermal paste again - nothing.
The PSU was fine - all non-essentials were disconnected, I tried reconnecting the 4+4 and 24pin cables - nothing.
I cleared the CMOS - nothing.
I changed the CMOS battery - nothing.
And I finally tried something that worked....wait for it....I tightened the screws of the socket itself. Duh, right? I have never had such an issue. This is a new board, I bought it on a discount because the box was opened and damaged. This goes into my own personal troubleshooting list.