I have a problem with 2 s17+ hashboards having this error. I have medium knowledge and can repair 60% of all the s17+ i see my eyes on. This one drives me crazy because i tried everything what i know off.

I replaced  chip 64 and 65 3 times and chips 63 one time. RO signal is 1,8 volt  and the clk signal is ok with 0,9 volt. All normal values as i know.

I replaced the voltage regulator and little part around chip 65 as a last measure. No result. Anyone has a tip or advice what to do?