[SOLVED] Antminer R4 fails to start: Test Patten on chain[6]/chain[7]: FAILED

[anemol]

My R4 fails to start this morning.

Soft/Hard reboot , reset to factory changes nothing.

The kernel-log displays this message at the end:

Code:

Below ASIC's core didn't receive all the nonce, they should receive 8 nonce each!

asic[12]=911
core[103]=7	

asic[25]=911
core[018]=7	

asic[26]=911
core[018]=7	



freq[00]=606	freq[01]=618	freq[02]=606	freq[03]=606	freq[04]=618	freq[05]=625	freq[06]=606	freq[07]=618	
freq[08]=625	freq[09]=606	freq[10]=618	freq[11]=625	freq[12]=612	freq[13]=618	freq[14]=625	freq[15]=612	
freq[16]=618	freq[17]=625	freq[18]=612	freq[19]=618	freq[20]=625	freq[21]=612	freq[22]=618	freq[23]=618	
freq[24]=612	freq[25]=618	freq[26]=625	freq[27]=612	freq[28]=618	freq[29]=625	freq[30]=612	freq[31]=618	
freq[32]=625	freq[33]=612	freq[34]=612	freq[35]=625	freq[36]=612	freq[37]=618	freq[38]=537	freq[39]=612	
freq[40]=520	freq[41]=625	freq[42]=606	freq[43]=618	freq[44]=625	freq[45]=612	freq[46]=618	freq[47]=625	
freq[48]=612	freq[49]=600	freq[50]=625	freq[51]=612	freq[52]=618	freq[53]=625	freq[54]=612	freq[55]=537	
freq[56]=625	freq[57]=612	freq[58]=612	freq[59]=625	freq[60]=612	freq[61]=625	freq[62]=625	

total valid nonce number:57453
total send work number:57456
require valid nonce number:57456
repeated_nonce_num:0
err_nonce_num:50087
last_nonce_num:41733
chain[6]: All chip cores are opened OK!
Test Patten on chain[6]: FAILED!
Try to add voltage on chain[6]...
chain[7]: All chip cores are opened OK!
Test Patten on chain[7]: FAILED!
Try to add voltage on chain[7]...
restartNum = 2 , auto-reinit enabled...
Chain[6] Chip[3] TempTypeID=55 middle offset=-10
Chain[6] Chip[3] local Temp=40
Chain[6] Chip[3] middle Temp=56
Chain[6] Chip[4] TempTypeID=55 middle offset=-6
Chain[6] Chip[4] local Temp=57
Chain[6] Chip[4] middle Temp=79
Chain[7] Chip[3] TempTypeID=55 middle offset=-10
Chain[7] Chip[3] local Temp=53
Chain[7] Chip[3] middle Temp=75
Chain[7] Chip[4] TempTypeID=55 middle offset=-7
Chain[7] Chip[4] local Temp=45
Chain[7] Chip[4] middle Temp=65
FAN PWM: 62

Is a hardware failure?  Possible to shunt the faulty ships? (see nothing about this option in the user interface of the R4)

[fanatic26]

With the way these boards are designed there is no way to bypass faulty chip. It is a string design, think of it like a set of cheap christmas lights. One bulb burns and the whole strand dies.

[anemol]

I tested:
- Perform reset
- Hard reset
and gave me same errors.

My vendor requested to me to test a third method   (IP reporter reset  , ie https://enforum.bitmain.com/bbs/topics/3957)

The R4 works again.

I hope this will be useful to other users.