SIIG Transport GX21 B5350 - Manual (Page 35)

3.2 Replacing motherboard components
Chapter 3: Replacing installed components 29
Note:
If there is an FDD installed you will
have to disconnect those cables too before
you can remove the motherboard.
3. Disconnect front panel LED and USB connectors.
4. Remove fan and COM port connectors
Front panel LED connector USB connector