Built a new PC and it won't power on any more

[Joshua_217]

Initially it did power on, all the fans spun and lights came on where they were supposed to. However I wasn't getting a signal on my monitor. after three attempts at fixing the signal issue the computer stopped powering on altogether. I suspect this means it's an issue with either the mobo or power supply. I've gone as far as bread boarding. building on the anti static bag it came with on my desk. I cannot get any response. I've also tried the paperclip method of texting the power supply. the fan spun gently. would it be safe to assume my mobo is broken?

 

[Barty1884]

Please post your full system spec. You may have some incompatibility somewhere, or may require a BIOS update (H110 board + KabyLake CPU perhaps?)

Breadboarding not working is not a great sign and (outside of a BIOS issue) could indicate a hardware problem.
What, specifically did you use to breadboard? If you have onboard graphics, use that. Should be the bare minimum. CPU+HSF+Mobo+1x RAM Module. Would need the GPU if you have no onboard graphics. Specs will help.

Ultimately, the "paperclip method" only determines that the PSU powers on..... not that it can adequately power any given setup. It's a little too early to rule this as a motherboard problem.

 

[gasaraki]

Also, don't build stuff on top of anti static bags. That's where the static is...

 

[sarcophagus_macabre]

The cardboard box is better to build on. As stated above, the outside of antistatic bags is where the static goes. They are only antistatic on the inside!

 

[Joshua_217]

My specs are:
- intel i5 7600k
- asrock z270 pro4
- gtx 1080 (gigabyte blower design)
- (2x8) DDR4 2400 gskill ram
- corsair rm550x power supply

I also have an older cpu cooler from a friend, that works well enough and is obviously the appropriate socket type.

for breadboarding I stripped it down to the bear minimum. 1 stick of ram, cpu, mobo and psu. didn't connect anything extraneous other than the power button (no buttons on mobo, and shorting seemed antagonistic at this point). What is the ideal surface to be breadboarding on if not antistatic packaging, presumably a wooden desk is fine when you remain grounded (through PSU ground)?

I don't really have access to additional PSU's to test the mobo with, although I am open to any suggestions about where I might find some (or rent a multi-meter) I am going to look in the morning at local computer shops to see if they offer any for rental

 

[Joshua_217]

I did also try shorting recently in case the power button was the issue. no result.

 

[sarcophagus_macabre]

I use the motherboard box, since it's been recommended by lots of tech forums. . . .