![background image](http://html.mh-extra.com/html/lenovo/thinkagile-hx1521-r/thinkagile-hx1521-r_user-manual_202680025.webp)
Table 6. Components on the system board (continued)
Callout
Callout
23
System fan 5 connector
24
System fan 6 connector
25
Backplane power connector 1
26
NVMe 2–3 connector
27
NVMe 0–1 connector
28
GPU power connector 1
29
CMOS battery
30
M.2 module slot (SATA / PCIe slot 8)
Notes:
•
1
Trusted Cryptography Module
•
2
Trusted Platform Module
System board LEDs
The illustration in this section shows the LEDs on the system board.
Figure 10. System board LEDs
Table 7. LEDs on the system board
Callout
Callout
1
System power LED
2
System ID LED
3
System error LED
4
DIMM error LEDs (24)
5
Fan 1 error LED
6
Fan 2 error LED
7
Fan 3 error LED
8
Fan 4 error LED
9
Fan 5 error LED
10
Fan 6 error LED
.
21