16-SOIC: MX25L51245GMI-08G = BMC 64MB
16-SOIC: 25M02GVSFIG = flashdisk for BMC
8-SOIC: MX25L25673GM2I-10G ( or -08G) = BIOS 32MB
H12SSL-I Stuck at "bmc initiating"
- Thread starter Dick Lee
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- bmc boot failure supermicro
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16-SOIC: 25M02GVSFIG = flashdisk for BMC
8-SOIC: MX25L25673GM2I-10G ( or -08G) = BIOS 32MB
this issue is because of damage/defective VR regulators for the BMC & DRAM. flashing FW does not help.
NOTE: if you connect a programmer-clamp to the BIOS or BMC, you will power up the whole mboard.
LEDs start to flash etc. the H12 (and others) are Root of Trust (RoT) protection against hackers with physical access.
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This is not a problem, then I will need to unsolder the Chip and reflash it on the programmer
But I don’t quite understand which chip I should flash
16-SOIC: MX25L51245GMI-08G = BMC 64MB
16-SOIC: 25M02GVSFIG = flashdisk for BMC
8-SOIC: MX25L25673GM2I-10G ( or -08G) = BIOS 32MB
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Today I started fixing the motherboard and discovered that my LEDs do not turn on.
I wrote to RMA support and it turned out that there is still a guarantee until September 26
In any case, thank you very much for your answer, it was very helpful!!!
If I understand correctly In this case, flashing the firmware will not help
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@RolloZ170 - what are your thoughts on putting some thermal gap filler material on top of the U4 - U5 - U6 regulators? Gap fillers from Laird have a thermal conductivity of 7.5W/mk
That way they won't overheat
That way they won't overheat
Hi I have the same problem too fortunately my motherboard is still under warranty, I sent it to supermicro for repair and what they wrote to me
1.Visual inspection found,PCB Damaged,damaged parts at U6.
2.Customer report problem found.
3.PCB damaged,unable to repair.
When I got the MOBO back and looked under a microscope, PCB just scratched, not damaged.
If anyone knows how to repair U6
Any answer is accepted
View attachment 33490
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It's possible, but not for the faint of heart. Before starting to solder anything I would verify the state of the regulator outputs. Plug the motherboard into an ATX power supply (standby only, no need to boot anything) and check the voltages output voltages from U4, U5, U6. They output through the L6, L6, L8 inductors respectively. Hold one multi-meter probe to ground, one on the pad right next to the L6/7/8 silkscreen. Not definitive, but from my repair I think you should expect L6=2.5v, L7=1.2v, L8=1.15v.
The regulator is a TPS62088. Read the datasheet. Poke around with a multi-meter a little more to convince yourself the regulator is dead and not something else. If you're ready to commit to the replacement, find a hot air rework station, tweezers, fresh flux, and a PCB pre-heater. Unless you are a wizard with microscopic surface mount components, order 5x more TPS62088 parts than what you think you need. The PCB pre-heater is not optional. I tried without at first, but sacrificed many voltage regulator components to failure.
Good luck
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Thanks for the answer.
I'll wait a little because I wrote a letter to RMA, let's see what they answer me and additionally gave them a link to this forum so that they can see that many people have a problem with bmc+U6
maybe they’ll even change my motherboard, but that’s uncertain.
I meant - if it was covered by thermal gap filler or even if we put some thermal adhesive on it - this would protect the very fragile component. I suspect that even if it is accidentally brushed by a metal part it is very brittle and will break apart. Putting thermally adhesive putty on top would allow it to thermally conduct and at the same time, be protected from accidental bumps
I did the same and they told me that the motherboard cannot be repaired, but they did not change it. And at the moment I am having a discussion about the solution to my problem
I explained to SM that the problem is not scratches, but that there is a problem with bmc on the H12SSL-I series ofMOBO
Hi, in general, this is the situation, I wrote a letter to RMA support.
They refused to change the motherboard((
when asked what they did, they answered like this
"We have replaced U6 but its function still has problem"
Can you advise me which hot station to buy with preheating?
Regarding the regulator itself, this model is suitable TPS62088YFPT ?
TPS62088YFPR/ TPS62088YFPRT is same but diff. package quantity.
if they have replaced U6 and still no function there may other component behind shorting/overloading.
Here I must mention the responsibility of RMA support
when I bought the board from a Chinese guy through eBay
I didn't know there were scratches as shown in the picture.
accordingly, SM mentioned this to me and despite this, they agreed to try to fix the board
I still have questions for the supermicro if there was no physical damage but the bmc component simply failed
Then why didn’t they exchange it for me if it’s under warranty?
a few months ago I had a similar situation but only with X12SPL-F
after updating the BIOS the board did not start and they exchanged it for me
when I bought the board from a Chinese guy through eBay
I didn't know there were scratches as shown in the picture.
accordingly, SM mentioned this to me and despite this, they agreed to try to fix the board
I still have questions for the supermicro if there was no physical damage but the bmc component simply failed
Then why didn’t they exchange it for me if it’s under warranty?
a few months ago I had a similar situation but only with X12SPL-F
after updating the BIOS the board did not start and they exchanged it for me
Hi a question for you
maybe the problem lies in the BIOS chip and BMC itself, at the moment I’m not going to physically interfere with the repair because I’m having a discussion with a SM, so as not to lose the warranty,but it’s interesting to know