1. Replace the mainboard.
When replacing the mainboard, do not damage the ejector pin of the CPU slot.
After removing the CPU of the mainboard, close the CPU protective cover
immediately and install the CPU on the new mainboard. Repeat the preceding
steps to replace all CPUs.
2. After the mainboard is
replaced, power on the server. It is found that the BMC of the server can be
started properly. Log in to the BMC and remotely connect to the OS of the
customer server. The connection fails.
3. The BMC shows that no
fault alarm is generated on the server. Check the system hardware configuration
by using the BMC. It is found that the number of CPUs is abnormal. The number
of CPUs displayed on the BMC is different from the actual number of CPUs
configured on the server. Therefore, some CPUs may be faulty.
4. No CPU spare parts are
available on site. Therefore, start the server with the minimum configuration
and check for CPUs that have been damaged.
5. The server model is RH2485
V2. The minimum configuration requires at least two CPUs and two DIMMs
(depending on the actual situation). The minimum configuration of RH2485 V2 consists of at least
the two CPUs in slots 1 and 2 on the mainboard and the DIMMs with the highest
priority in the two CPU slots. For details about the memory channel with the
highest priority, see the RH2485 V2 product documentation at the following
The server can start properly with the minimum configuration. The login to the
customer's service operating system through the BMC is successful and the OS
startup is normal.
6. According to the test
result, the two CPUs and DIMMs of the RH2485 V2 are normal. Use another CPU to
replace the CPU in slot 1 on the mainboard. If the server cannot start
normally, the newly installed CPU is faulty. Then, apply for a new CPU to
replace the faulty CPU. (If all CPUs are normal, use the same method to check
whether any DIMM is faulty.)
7. After the faulty mainboard
and CPU of the server are replaced, the server can start properly and can
connect to customer's service system successfully. The server fault is
8. Because an independent
video card is installed on the server and the mainboard is replaced, change the
default video mode from integrated to independent.
change the video mode to independent in the BIOS, perform the following steps:
the server and press DEL to enter the BIOS.
Navigate to Advanced
, and set Onboard Video