I also have connected to PCI-E slots:
Asus Xonar D2X sound card
Hauppauge Colussus video capture card
Blackgold 3600 TV tuner
And a Samsung SSD, 4 hard drives, and 2 optical drives.
All the above are connected up.
The problem is this:
On turning the system on, the CPU_LED on the motherboard lights up red and stays lit.
The Q-LED diagnostic display displays 00 (description in manual for this code is 'Not used').
There is no output from the graphics card.
The case does not have a speaker, so I cannot listen for beeps.
All fans (VGA, case and CPU cooler) are spinning.
I have updated to the latest BIOS via USB flash.
I have removed the RAM and placed one stick into different slots.
I have removed the CPU - none of the motherboard pins appear bent.
Does anyone have any ideas please on what I can do next? Will I need to replace some components, and if so, how will I know which is faulty?
Yes, the 8-pin 12v is plugged in as are all the connections I can think of. I checked the 8-pin connection by removing it and trying to turn on the computer - same problem, but this time the Q-LED did not even turn on. So the 8-pin connector is doing something at least!
No unfortunately. Nothing that the processor will fit into anyway. I suspect I will have to replace the motherboard unless someone has any other ideas. If that doesn't work, then I'll try to replace the CPU. Quite annoying as I have been buying the components online and it takes a few days to go through the whole RMA process.
HSF is the Noctua NH-D14 SE2011.
Case is the Antec P280 - case fans are all connected together and powered by a direct 4-pin peripheral power connector to the PSU, so can't plug these in to the motherboard without taking things apart.
I tried connecting the HSF to other fan headers on the motherboard, but there is no change to the red CPU-LED or the Q-LED 00 display.