TRENDnet Cable Modem/xDSL TW100-W1CA - Manual (Page 33)

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Figure 22
5. When the following screen appears, power on the device.
Figure 23
6. Expect to wait for a few seconds before the upload program detects the device. Once the
device is detected, the program will start uploading the firmware automatically. The
upload process takes a couple of minutes. After the upload is completed, this device will
automatically restart.
Note: DO NOT interrupt the firmware uploading process.
7. When the upload finished, the screen should look like Figure 24 below.
Figure 24
If any error message appears , check the cable connection and make sure that you have
selected the correct COM port, then perform the upgrade again.