CS1642 / CS1644 User Manual
32
Upgrade Failed
Shorting the Mainboard Jumper
If the Upgrade Succeeded screen doesn’t appear, it means that the upgrade
failed to complete successfully, in which case you should do the following:
1. Power off the CS1642 / CS1644 and remove its housing.
2. Using a jumper cap, short the jumper on the mainboard labeled J40 on the
CS1642, and J45 on the CS1644. The diagram below indicates the jumper
location on the CS1642 / CS1644 boards:
3. Power on the CS1642 / CS1644. It will now work with the factory default
firmware.
4. Do the firmware upgrade procedure again.
5. After the upgrade procedure completes, power off the switch, remove the
jumper cap from J45, close the housing, and power the CS1642 / CS1644
on again.
