OLD SCHOOL: Tyan K7 Tiger (S2462) system not powering on?

[Centauri]

Hey guys,

Just built a retro rig around the Tyan S2462 Athlon MP board. Bought it from an eBay tech seller as tested and working. Using the MP 2600+ CPUs it came with. Added in 4x 1GB of Samsung ECC 2700 DDR.

Trying to achieve a first boot and nothing is happening whatsoever. Not even a brief fan spin up.

I have cleared CMOS multiple times, tried fewer/alternating DIMMs and... nada.

I do have the 8-pin CPU power connected as well.

Any ideas?

 

[thigobr]

It seems this Tyan board uses ATX GES connector pinout which is different than EPS12...
https://flylib.com/books/en/4.55.1.48/1/

 

[Centauri]

Well that's lovely. Thanks for the tip.

And, uh-oh...

"Because the ATX GES and WTX power supplies use different pinouts than the ATX12V and EPS12V power supplies, if you install an ATX GES or WTX-compatible power supply in a server designed to use ATX12V v2.x or EPS12V, or vice versa, you will damage the motherboard and power supply."

Hmmm...

 

[thigobr]

Yes, but hopefully your parts are still ok as most modern power supplies have pretty good safety protections (short circuit, over voltage, etc).