After initial success h87n won't fully power on

The build:
h87n rev 2
Intel Core i7-4790S LGA 1150 - BX80646I74790S
Samsung Electronics 840 EVO-Series 500GB 2.5-Inch SATA III
Crucial Ballistix Sport Very Low Profile 16GB Kit (8GBx2) DDR3-1600 1.35V UDIMM 240-Pin


Mini-Box picoPSU-160-XT High Power 24 Pin Mini-ITX Power Supply
Wesena, ITX5-B (Black) - 100% Aluminum, Mini HTPC chassis

This is my second Hackintosh after many Linux/windows builds.

following instructions I installed Mavericks and got on board BT working with keyboard and mouse. I only used Ethernet. I put it in a corner somewhere without keyboard/monitor and played with it through Remote Desktop from a mini for several days without any problems. One day it wouldn't wake up and/or boot.

The cpu fan spins up and down. System fan initially worked and now won't. I got another pico psu - same result. I tested 2 different AC bricks. Before the build I tested the pico psu using coolmax and it passed.
now it fails at PG. The new pico fails the PG test out of the box.

I don't know how important the PG test is. I noticed during initial build that during POST I was getting a few memory access errors before continuing successfully. Was it due to slow power ramp up?

Do I have 2 bad pico psus? Or my board failed? I guess I've been lucky and never had to deal with such problem. Help greatly appreciated.

After initial success h87n won't fully power on - follow up

To close the thread. It booted after resetting CMOS. However, the board, at least in this configuration, is very temperamental. It gets into POST loop, typically booting in the second attempt. Onboard Bluetooth sometimes works, sometimes doesn't. Audio (analog) is also unreliable. Halting the processor sometimes just resets it.

I unplugged SD card reader that came with the case and removed the card with onboard wifi/bluetooth. Got usb bluetooth, which doesn't wake it up but is reliable. The POST problems seem to have disappeared.

One issue remains. After boot the analog audio works. However, after it wakes up from sleep the audio no longer works. Have to reboot again.