Surely the board is bad, but have you ever seen it report asic_num=70 before?
https://pastebin.com/awj4wSUKread PIC voltage=940 on chain[7]
Chain:7 chipnum=70
Chain[J8] voltage added=0.0V
Chain:7 temp offset=0
Chain:7 base freq=643
Asic[ 0]:643
Asic[ 1]:643 Asic[ 2]:643 Asic[ 3]:643 Asic[ 4]:643 Asic[ 5]:643 Asic[ 6]:643 Asic[ 7]:643 Asic[ 8]:643
Asic[ 9]:643 Asic[10]:643 Asic[11]:643 Asic[12]:643 Asic[13]:643 Asic[14]:643 Asic[15]:643 Asic[16]:643
Asic[17]:643 Asic[18]:643 Asic[19]:643 Asic[20]:643 Asic[21]:643 Asic[22]:643 Asic[23]:643 Asic[24]:643
Asic[25]:643 Asic[26]:643 Asic[27]:643 Asic[28]:643 Asic[29]:643 Asic[30]:643 Asic[31]:643 Asic[32]:643
Asic[33]:643 Asic[34]:643 Asic[35]:643 Asic[36]:643 Asic[37]:643 Asic[38]:643 Asic[39]:643 Asic[40]:643
Asic[41]:643 Asic[42]:643 Asic[43]:643 Asic[44]:643 Asic[45]:643 Asic[46]:643 Asic[47]:643 Asic[48]:643
Asic[49]:643 Asic[50]:643 Asic[51]:643 Asic[52]:643 Asic[53]:643 Asic[54]:643 Asic[55]:643 Asic[56]:643
Asic[57]:643 Asic[58]:643 Asic[59]:643 Asic[60]:643 Asic[61]:643 Asic[62]:643 Asic[63]:200 Asic[64]:200
Asic[65]:200 Asic[66]:200 Asic[67]:200 Asic[68]:200 Asic[69]:200
Chain:7 max freq=643
Chain:7 min freq=200