Troubleshooting Procedures; General Technique; No Power - Supermicro SYS-521C-NR User Manual

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7.3 Troubleshooting Procedures

Use the following procedures to troubleshoot your system. If you have followed all of the
procedures below and still need assistance, refer to the
Returning Merchandise for Service
changing any non hot-swap hardware components.

General Technique

If you experience unstable operation or get no boot response, try:
1. With power off, remove all but one DIMM and other added components, such as add-on
cards, from the motherboard. Make sure the motherboard is not shorted to the chassis.
2. Set all jumpers to their default positions.
3. Power up. If the system boots, check for memory errors and add-on card problems.

No Power

Check that the power LED on the motherboard is on.
JAIOM1
JFP2
MH5
JAIOM1_1
JBT1
CMOS CLEAR
Make sure that the power connector is connected to the power supply.
Check that the motherboard battery still supplies approximately 3VDC. If it does not,
replace it.
JS2
JS2:SATA 8-11
J10
Check that the system input voltage is 100-120v or 180-240v.
JRK1
JS1
JS1:SATA 0-7
JRK1:
RAID KEY-1
JPME1
1-2:NORMAL
2-3:ME RECOVERY
JPME2
JPME1
1-2:NORMAL
Turn the power switch on and off to test the system.
2-3:ME MANUFACTURING MODE
JPME2
JL1:
CHASSIS INTRUSION
MH4
JL1
JNVME1
JNVME2
FAN6
FAN5
JFP1
section(s) in this chapter.
JUIDB1
JP2
J13
COM1
JRU1
VGA
JWD1
MH1
JRU1:JFP1 CTRL
1-2:UID
JM2_2
2-3:RST
PCIe 3.0 x2
JTPM1
M.2-P_2
JUSBRJ45
M.2 NVME
JWD1:WATCH DOG
JUSBRJ45:
1-2:RST
LED4
USB2/3(3.0)
2-3:NMI
TPM/PORT80
JSTBY1
IPMI_LAN
LED1
JPG1
JPG1:VGA
1-2:ENABLE
2-3:DISABLE
JLUIO1
JRUIO1
JLUIO2
JRUIO2
M.2_MH4
JPCIE1
M.2_MH3
MH15
MH3
X13SEDW-F
REV:1.01A
DESIGNED IN USA
CPU
Figure 7-3. Location of the MB Power LED
JNVME3
JNVME4
FAN4
75
Chapter 7: Troubleshooting and Support
Technical Support Procedures
Power down
MH2
JM2_1
PCIe 3.0x2
M.2-P_1
M.2 NVME
M.2_MH1
JAIOM2
JF1
P1-AIOM PCIe 5.0 x16
JAIOM2_1
JIPMB1
LE1
M.2_MH2
MH16
USB0/1
JSPD1
MH6
JNCSI1
JAIOM2_2
JPI2C1
BT1
BT1: BATTERY
JPWR1
BIOS LICENSE
JPWR2
JPWR3
MH9
JNVME8
JNVME7
JNVME6
JNVME5
FAN3
FAN2
FAN1
or
the system before
LE1

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