New-ish build not turning on

[Angella_D]

Custom build 06/2016. Verified working PSU (EVGA SuperNOVA 1000G1).

Intel Core i5-6500 6M Skylake Quad-Core 3.2 GHz
CORSAIR CX series CX500M 500W ATX12V v2.3
GIGABYTE GA-B150M-D3H (rev. 1.0) LGA 1151 Intel Micro ATX Intel Motherboard
TP-LINK TL-WDN4800 Dual Band Wireless N900 PCI Express Adapter
Cooler Master Hyper 212 EVO - CPU Cooler with 120 mm PWM Fan
Upgraded from EVGA GeForce GTX 750Ti to EVGA GeForce GTX 950 12/1/2016.

Build working wonderfully until this past weekend. Put to sleep after gaming. When attempted to wake-up, no results. Noticed that the light on the computer was on like it had awoken from sleep. No output to monitors. Held power button until went off. Tried to restart. Nothing.

Thought I had a bad PSU. Ordered new unit to replace 500W Corsair. Nothing. Verified new unit working with tester that came with it.

Thoughts on how to proceed appreciated!

 

[SgtScream]

Try reseating the memory.

 

[Henry0210]

Are you using DisplayPort for your monitors?

 

[Angella_D]

Try reseating the memory.

Done this. The system acts like it is not getting any power. Replaced PSU. Have taken it apart and put it back together, double-checking every hook-up.

Figured it could be the mobo, replaced. STILL NOTHING.

Fans do twitch after replacing mobo, but only for an instant.

 

[SgtScream]

Did you check to see if the components worked outside of the case when you took it apart and put it back together? You should have responded right after reseating the memory so I could tell you what to do next.