Supermicro H11SSL-I-O only heartbeat light, no system power light

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tesla100

Active Member
Jun 15, 2016
273
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For the post code? It was FF I think.

Also, what can I use to diagnose the CPUs? As we don't get "motherboard LED1" to turn on, so I don't know how we can get any diagnosis on the CPUs itself... or even the motherboard. Is there some part we can use? Surely there is another way to help debug this / rule things out.

Any ideas? As without motherboard power (LED1), we can't tell anything from IPMI right?
What is the status, Root.ed? Did you manage to make those motherboards running?
 

Timo

New Member
Sep 29, 2019
16
4
3
I have probably the same issue! Keep me up to date.
7502P - H12SSW (BIOS Code FF and no LED)
 

Henry42

New Member
Sep 15, 2020
1
1
1
A related issue that may have a connection and result in confusion when troubleshooting the senarios above which I just ran into. I have a H11SSL which I had set up very bare bones (no power switch) which I had tested ok for reboot when power is restored. It runs Ubuntu. I needed to make a change to its mounting and shutdown from Ubuntu. After I had remounted the mobo it simply would not boot - no fan on PSU indicating that the motherboard was not signalling the PSU to turn on main power despite standby power and BMC LED being OK. Thanks to reading the above I plugged in another LAN cable for the IPMI and noticed a "Power On" button. Instant joy !!! I later discovered I had the BIOS setting "Restore on AC Power Loss" set to "Last State". My careful shutdown had set the state accordingly and the board dutifully failed to power on.
 
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Magic8Ball

Member
Nov 27, 2019
53
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I thought I'd share my (vaguely) similar story as someone might find it useful.

I have a supermicro X11SCL which gave me a major headache at first because I couldn't get it to post/boot no matter what I did, no power-on led or other signs of life, but I could get access to IPMI just fine. After a very long series of tests I finally found the problem was the power supply. I had been using a slightly older top-brand 80+ silver PSU which turned out to be version ATX 2.2, and despite being physically and electrically identical (AFAIK) to the latest ATX 2.4 standard there can sometimes be strange issues with recent motherboards (apparently due to the way they utilise power slightly differently these days). Swapping it out for a brand new PSU solved the issues, so the morale of the story is, make sure your PSU is at least reasonably new before ruling it out as the cause, epesically if you test with a spare from an old build.

Hope that helps.
 

CATA

New Member
Nov 16, 2023
1
0
1
I thought I'd share my (vaguely) similar story as someone might find it useful.

I have a supermicro X11SCL which gave me a major headache at first because I couldn't get it to post/boot no matter what I did, no power-on led or other signs of life, but I could get access to IPMI just fine. After a very long series of tests I finally found the problem was the power supply. I had been using a slightly older top-brand 80+ silver PSU which turned out to be version ATX 2.2, and despite being physically and electrically identical (AFAIK) to the latest ATX 2.4 standard there can sometimes be strange issues with recent motherboards (apparently due to the way they utilise power slightly differently these days). Swapping it out for a brand new PSU solved the issues, so the morale of the story is, make sure your PSU is at least reasonably new before ruling it out as the cause, epesically if you test with a spare from an old build.

Hope that helps.
So , What PSU have u used ?
A PSU with standard ATX v3.0 will be good ?

Thx
 

willko

New Member
May 17, 2011
4
0
1
Hi all,... so I have an H11SSL-I and it is behaving exactly as OP described.. I get the BMC LED blinking,.. but no power LED. I can access BMC, but BIOS will not boot
Did anyone ever resolve this as a "known issue" or was it the case the boards just died...?
 

willko

New Member
May 17, 2011
4
0
1
@Timo - Ouch - sorry to hear that.

I'm also using the Noctua cooler (U14S TR4-SP3) too... This is a mobo /cpu from China, bought of ebay for a great price,.. but here I am. :)
In *frustration* I (somewhat gently) played with the cooler, wiggling it,.. trying to apply a bit of pressure to the cpu board,..just to see what happens...

Guess what - it just booted and the power LED came on...LOL! So,.. I'm thinking... this cooler... in a tower,.. maybe these SP3 sockets are sensitive enough that the weight is enough..? I've had the board now for 4 weeks... Out of box it was fine,.. setup & running same day.. Ran till 4 days ago then I had this issue... Tried everything.. Only thing left to do was re-seat CPU but no tools.... I guess I'm gonna get the right tools and re-seat this ,...and a new cooler?

I really hope this is the problem.... I had such high hopes for a "Supermicro" board,.. but then again,.. these Epyc CPUs are just too big/delicate for their own good. Who knows,.. I will post again after re-seat etc. As previous poster mentioned,.. so many power related pins on these,.. and so many contacts.... Not great for confidence in a home lab server though.... :(