Hi guys! Thanks for the thread, I enjoy reading it every day 
I've just bought 2x Delta's 2400W with 2x PICO adapters so I can connect the PSU's to my MB's, but both MB's won't start when I press the power on switch. It just spins for 2-3 sec the CPU fan and that's all. I see the PICO has a 4 pin connector for CPU and motherboard has a 8 pin connector... but on parallel miner site says that should work. Both MB are Biostar TB250-BTC Pro v6.0, so I'm thinking I've miss something.
PICO adapters: http://www.parallelminer.com/product/160watt-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-bypass-your-atx-power-supply-entirely/#close
MB: https://www.amazon.com/Biostar-Motherboard-TB250-BTC-PRO-Supports/dp/B0736PV196
Any advice is appreciated! Thanks.
I've just bought 2x Delta's 2400W with 2x PICO adapters so I can connect the PSU's to my MB's, but both MB's won't start when I press the power on switch. It just spins for 2-3 sec the CPU fan and that's all. I see the PICO has a 4 pin connector for CPU and motherboard has a 8 pin connector... but on parallel miner site says that should work. Both MB are Biostar TB250-BTC Pro v6.0, so I'm thinking I've miss something.
PICO adapters: http://www.parallelminer.com/product/160watt-24pin-atx-power-module-included-sata-molex-cpu-power-connectors-bypass-your-atx-power-supply-entirely/#close
MB: https://www.amazon.com/Biostar-Motherboard-TB250-BTC-PRO-Supports/dp/B0736PV196
Any advice is appreciated! Thanks.
Are you powering one Delta per rig?
I have the same board and 1 single delta can power up 12 x RX470 (modded and undervolted, slightly OCed).
I suspect not enough power to the motherboard.
During the first boot - get 4-5 cards working first and ensure 4G is enabled on mobo BIOS.
After successful boot up with 4-5 cards, then get the remaining cards's risers inserted.