possible issues for "find 0 asics" on S17+ crap boards?

[moftkhor]

Hello guys,

I've recently been digging in to repairing my S17+ hashboards that piled up here.
What are all the possible causes for the famous 0 asic found issues other than bad chips? And I mean on the hashboard itself. Not the control boards, or psu related issues as I'm using a dc power supply and asic test fixture to test these hashboards.

Thanks!

[BitMaxz]

Some other reasons the hashbord might have shorted parts that could lead to 0 ASICs.

Why not check the signals manually? ZeusBTC have a schematic where you can test all signals(CLK, TX, RX, BO, and RST) to find where the abnormal parts with abnormal signal then focus on that.

Or you can follow the complete guide from ZeusBTC here https://www.zeusbtc.com/manuals/Antminer-S17-plus-Hash-Board-Repair-Guide.asp
And then read the part under "V. Common Poor Phenomenon of Hash board and Troubleshooting Procedure" which is related to this issue.