Powering on for the first time with this MB and a Pentium CPU the PSU fans come on only for an brief instant (less than one second) along with the CPU cooler fan and then stop with no further activity. It will do this each time I turn the PSU off and back on. I tried two other PSUs with the same results. It's a 750W Corsair PSU and a Pentium G3258.
Have you ever experienced this during a build?
There was only an 8GB DDR3 RAM stick and a 120 GB Sata SSD connected at the time. I tried to remove the RAM and SSD but no change. I am assuming at this point it is a bad MB or CPU but not sure what to try next. I'm planning to return the MB to Newegg and will get a replacement but wondered if anyone else has any ideas whether it could be something else I'm missing. I initially connected the 24 pin CPU and 4+4 CPU cable along with the molex 12V for the extra PCIe power. I'm not sure if possibly plugging in the molex PCIe cable was a mistake since I didn't have any GPU's connected yet at the time. I unplugged it right away after the initial power on.
0 ·
Comments
So, return the motherboard and try see if the new one works.
Then I pulled the board out of the case and powered it up, same thing. Then I took the bracket off for the custom CPU fan and just ran it with the CPU fan setting on the CPU (I took the back panel off that the fan screws down to) and walla, the MB started up, had video and everything.
So I took some rubber stoppers that came with the CPU fan and put them between the mounting bracket on the back of the MB and screwed the CPU fan down and the system continued to boot. Then I put it back in the case and it still booted and then I attached everything and it still booted.
So my problem was, the mounting bracket for the CPU fan on the underside of the MB was shorting against something on the board and using the rubber stoppers as a buffer prevented the shorting and the system worked fine.
So if I were you, that is where I would look next.
Do you still need powered risers with 2 molex on the MB or can you just use non-powered in this case?
As I struggled with that I got a Biostar tb85 https://www.newegg.com/Product/ProductList.aspx?Submit=ENE&DEPA=0&Order=BESTMATCH&Description=tb85&N=-1&isNodeId=1
I haven't had any problems with these (2) at all.