problem with supermicro h11dsi

[0day]

hello, after 3 days of work, the motherboard does not work(((.
My server
Motherboard Mbd-h11dsi-b rev 2.0
1x amd epyc 7742
4x kingston dimm 3200
Power evga supernova 850g2

Problem with start-up.
When plugged in,
The LED3 on the bottom right is green, while the LEDM1 blinks regularly, there is no video signal, but respond to the power button. The CPU fans are switched on. The IPMI is alive. The vga jumper is on. Beeper not working.
Tried:
Reset the bios settings
swap memory. (without memory)
There is no result, is it possible to reset the settings through IPMI.

 

[RolloZ170]

4x kingston dimm 3200 exact type ? size ? must be RDIMM/LRDIMM
in which slots are the RAMs poulated ?
if you have much GB of RAM you have to wait 1 minute or 2 for DDR4 init/training/tests.
forgot to remove a motherboard standoff ? (shorting some signals on bottom side of the motherboard)
is the CPU and Motherboard new or used ?

 

[RolloZ170]

The LED3 on the bottom right is green, while the LEDM1 blinks regularly, there is no video signal,

video output comes later after memory init.

 

[0day]

4x kingston dimm 3200 exact type ? size ? must be RDIMM/LRDIMM
in which slots are the RAMs poulated ?

KSM32RS8/8MRR, according to manual (C and the same)

 

[0day]

forgot to remove a motherboard standoff ? (shorting some signals on bottom side of the motherboard)

board mounted on 6mm standoffs ( worked well for 3 days )
RAM new, used processor

 

[RolloZ170]

RAM new, used processor

processor or motherboard dead.

 

[0day]

processor or motherboard dead.

turn on motherboard without cpu?

 

[DavidWJohnston]

If it worked, then stopped, it might be an improper CPU mount.

Remove the CPUs, inspect the pins, and re-install the CPUs and coolers.

Make sure to follow the torquing instructions. For EPYC CPUs the tightening of the bolts needs to be done absolutely correctly in the right order, with the included wrench.

May as well re-seat the RAM while you're at it.

 

[RolloZ170]

turn on motherboard without cpu?

no.
test with other known working CPU.
or test CPU with other known working motherboard.

 

[0day]

test with other known working CPU.
or test CPU with other known working motherboard.

unfortunately, I have 1 processor and 1 board ,

 

[0day]

no.
test with other known working CPU.
or test CPU with other known working motherboard.

Can I test a board without a processor?

 

[RolloZ170]

Can I test a board without a processor?

will not turn on. no CPU, no video

 

[RolloZ170]

unfortunately, I have 1 processor and 1 board ,

what happened ?
BSOD/PSOD while running ?
don't reboot after BIOS/BMC update ?
if you have IPMI access, is there any Hint in the system LOGs
check IPMI post snoop...
PSU failed ? try other PSU.

board mounted on 6mm standoffs ( worked well for 3 days )

PCB is coated, maybe could withstand 3 days the mechanical force....who knows ?