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06-15-2020

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"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 1:56 AM

I'm currently experiencing a situation where my server is running perfectly for about 6-8 hours, but then encounters a "sysbrd vol fault", and won't boot until I physically unplug the power on the server, and plug it back in. During runtime, I don't get see any problems in IMM or DSA. Once the "sysbrd vol fault" error occurs (with an amber "BRD" light on the light path), I simply see that error as the system status in IMM. I haven't swapped out the CMOS battery yet, but I tested it with my multimeter, and it is showing above 3 volts, but I plan to swap this out anyway.

 

After the battery is swapped, and if it still occurs I have been thinking of the alternatives. I've seen this happen with two PSUs already, so that rules out the PSU. I know the two other main points of failure here are the main system board and the power paddle unit. What are the community's idea that this is the system board and not the power paddle? They are both expensive parts, so I'd rather minimize my chances of ordering the wrong part, and have to deal with extended downtime/money wasted if I choose wrong. Thoughts?

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46 Posts

09-11-2015

China

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  • Message 2 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 2:23 AM

Hi sir,

 

The problem you described seems match this problem we ever encountered.

 

The x3500 M5 machine might be able to power on after encountering the event "Sensor SysBrd Vol Fault 
has transitioned to critical from a less severe state." in Integrated Management Module II (IMM2) event 
log.

This instance can be observed by performing the following:

    1. Remove the side cover.
    2. Install the side cover back to chassis.
    3. Unplug the power cords on all power supplies.
    4. Plug the power cords on all power supplies.
    5. When the power LED is on, remove the side cover again. 
    6. Install the side cover again then Fault LED(!) would be on within 10 seconds.
    7. Check IMM2 event log and event "Sensor SysBrd Vol Fault has transitioned to critical from a less 
severe state." appears.
    8. System is unable to power on until the power cords on all power supplies are removed and installed.

The following event log history is an IMM2 event log sample for reference.

10,I,no,System,08/09/2016 15:23:04.193,1488,4000001600000000,"ENET[CIM:ep1] DHCP-HSTN=IMM2-40f2e9f72c44, 
DN=tdc-pe.labs.lenovo.com, IP@=172.16.1.102, SN=255.255.0.0, GW@=0.0.0.0, DNS1@=172.16.0.2 .",
11,I,no,System,08/09/2016 15:23:00.412,1487,4000001900000000,"LAN: Ethernet[IMM : ep2] interface is 
now active.",
12,I,no,System,08/09/2016 15:22:54.556,1486,4000001700000000,"ENET[CIM:ep2] IP-Cfg:HstName=IMM2-40f2e9f72c44, 
IP@=169.254.95.118 ,NetMsk=255.255.0.0, GW@=0.0.0.0 .",
13,I,no,System,08/09/2016 15:22:51.684,1485,4000003700000000,"ENET[CIM:ep1] IPv6-LinkLocal:HstName=IMM2-40f2e9f72c44, 
IP@=fe80::42f2:e9ff:fef7:2c44 ,Pref=64 .",
14,I,no,System,08/09/2016 15:22:49.455,1484,4000001900000000,"LAN: Ethernet[IMM : ep1] interface is 
now active.",
15,I,no,System,08/09/2016 15:22:44.385,1483,4000000100000000,"Management Controller SN# 06DWDGN Network 
Initialization Complete.",
16,I,no,Power,08/09/2016 15:21:44.381,1482,806F00091301FFFF,"Host Power has been turned off.",
17,E,2,System,08/09/2016 15:21:40.281,1480,80070202070115FF,"Sensor SysBrd Vol Fault has transitioned 
to critical from a less severe state.",
18,I,no,Power,08/09/2016 15:19:22.864,1478,806F00091301FFFF,"Host Power has been turned off.",
19,W,2,System,08/09/2016 15:19:14.748,1477,806F00051701FFFF,"The Chassis IBM System x3500 M4 was opened.",
20,I,no,Power,08/09/2016 15:16:40.342,1475,816F00091301FFFF,"Host Power has been turned on.",
21,I,no,Power,08/09/2016 14:36:05.907,1474,806F00091301FFFF,"Host Power has been turned off.",

 

Solution

This is regarded as a false alert since the system is able to power back on afterwards. 

This event is triggered by the specific procedure of power cord and side cover removal/installation.

This is a permanent restriction and there will be no solution.

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46 Posts

09-11-2015

China

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  • Message 3 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 2:24 AM

Affected Configuration

System x3500 M4, Type 7383
System x3500 M4, Type 7383 E5-xxxxV2

Affected Types

7383

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46 Posts

09-11-2015

China

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  • Message 4 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 2:52 AM

The correct machine type in the description is x3500 M4, not x3500 M5.

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6 Posts

06-15-2020

United States of America

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  • Message 5 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 3:21 AM
Do you think this can happen without opening the side cover? The server works well for 6-8 hours with no problem, and then turns off.
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6 Posts

06-15-2020

United States of America

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  • Message 6 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-15, 14:11 PM

I'll report that I have now replaced the CMOS battery with a new one, and the problem still occurs about 7.5 hours later. I have followed the procedure that you have posted, and also removed the second microprocessor expansion board as a test. It now continues to reboot in the middle of booting. It was able to complete POST once, and then turns off again. I have ordered a replacement power paddle unit, and will report the results after installation.

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46 Posts

09-11-2015

China

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  • Posts: 46
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  • Message 7 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-18, 1:24 AM

Hi sir,

 

If you have enough time to PD the problem, you can try to test the system with minimum configuration test.

That's one CPU+one DIMM+one planar + one PSU+ FANs

Remove any other device and cables including the OP panel cables and PCI devices

Power on the system through IMM remote function.

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6 Posts

06-15-2020

United States of America

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  • Message 8 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-06-19, 0:06 AM

I've installed the new power paddle unit, and am currently testing with minimum configuration. I will report back with the result. Thanks.

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6 Posts

06-15-2020

United States of America

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  • Message 9 of 9

Re:"SysBrd Vol Fault" every few hours on x3500 M4?

2020-07-06, 18:56 PM

I installed the new power paddle board, but this did not resolve the problem. Instead of buying a new system board. I decided to switch to a Supermicro server instead, because the parts are not proprietary, and I have a lot more choices in buying them. At some point, I will replace the system board, but this seems like a better option that just buying parts to determine if something is resolved. With the great engineering that this server has, I am surprised and disappointed that there is so much confusion as to what has failed. I hope that Lenovo has done a better job recognizing root cause of issues with the current models.

 

For those visiting this forum looking for answers, here is a recap of what I did:

 

  1. Replaced hot swappable PSU.
  2. Replaced CR2302 battery on the system board.
  3. Reset the BIOS settings via jumper.
  4. Replaced the power paddle unit.

 

All of this was done with testing a minimal configuration with 1 CPU and 1 stick of RAM as well. None of this resolved the issue, and the next step is to presumably buy a new system board. But I cannot confirm that this would resolve it as of right now. I still find it quite odd that it runs fine for the amount of hours that it does, and works fine again with no errors in IMM once the power cable is removed and reinserted. My experience with system boards from other machines is that they either fail completely or not at all. I've never experienced this sort of gray area before.

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