I have been unable to get my SeaSonic S12-500 to show any life with my ASRock 939SLI32-eSATA2 MB. The PS comes on when tested with a cheap PS tester and it worked with an old 1988 (Pentium2 ?) System. Likewise the MB worked when powered by an Antec NEO480 PS.
I contacted SeaSonic and got this reply:
I plan to try the resistor fix on the 12V rails. Technically I'm no sure what the +5vsb does and how to test.Dear Sir
As you said the unit works fine on another system. That means the PSU is not a fault. The symptom you mentioned does not look like a min 12V load issue, which will let the fan turn for a while and then shut off. While this, raising more 12V load would overcome this in practice. And you can try if it works on your case.
However, the symptom that neither the PSU fan nor the CPU fan would turn on is more likely a +5vsb over load issue. This results from the +5vsb load of system is over and out of spec of the PSU. Please be informed that the S12-500 truly conforms to the newest Intel specifications and have been tested by Intel to be in conformity. Recommend you to ease the peripheral or contact our local RMA department to see if they can do further for you, thanks.
Thanks for any help.
Rest of the system:
Ever Case E4252BB
AMD Athlon 64 3000+ Venice
OCZ 2GB (2 x 1GB) 184-Pin DDR SDRAM DDR 400 (PC 3200) Unbuffered Dual Channel
eVGA 256-P2-N437-LX Geforce 7300GS
Seagate Barracuda 7200.9 ST3250824AS 250G
NEC 16X DVDÂ±R DVD Burner
LINKSKEY LKA-CR15B 19-in-1 USB 2.0 Reader/Writer
SONY Black 1.44MB 3.5" Internal Floppy
DELL - UltraSharp 1907FP
Microsoft Windows XP Home With SP2 - OEM