The LED's that are on are the ones for power, trickle, and DIMM 1 on riser one. However, the dim light can be resolved if the ram is moved to riser two 9 I have one stick). Even with no ram, the same two lights come on, but no beeps.. The power light flashing is on, off. I even watched it for a minute to look for a pause, but there was no pause.
If I understand your post, you need a pair of ram sticks, same size and vendor, not just one stick.
Have you tried swapping the risers, top to bottom? If you have only one pair, those would go in whichever riser is the top one.
also note:
1 flash indicates that no memory is detected, or none is installed. (This is repeating, and I think is what you are seeing_
3 repeating flashes that repeat means the memory fails the self test, so memory is detected, but fails test.
So, one beep should indicate that the memory, even if installed, is not detected. Could be incompatible memory, or maybe even that one or both of the memory risers are bad.
Do you ever get a boot chime, even after trying to reset PRAM/NVRAM?
You get one beep per second, with no boot chime. And, there's no difference even if you remove ALL ram?
Do any other LEDs come on if you press the DIAG_LED button? You would particularly look for LED 2 and 3
Do the fans spin up. then continue to spin? Or, do the fans run briefly, then stop?
Try reseating the graphics card. If that card has a power cord, make sure it is plugged in properly.
If nothing else helps, I suspect that you have a bad logic board, but you may want to try different memory riser cards.
That also assumes that the memory that you have is compatible FB-DIMMs, which should have full heat sinks.