Transmit modem READY LED not lit
If the transmit modem is not operating normally and its READY LED is not lit, as shown in Figure 67, take the following steps.
•Check that the receive modem READY LED is continuously lit. If not, try the sequence in Problem: receive modem READY LED not on on page 88.
•Check that the
•Check to make sure the power cord is securely attached to the receive modem and plugged into the wall outlet or surge protector. See Figure 66. If the power cord was loose, the transmit modem READY led may come on.
•If securing the power cord does not solve the problem, check all cable connections. Tighten any that seem loose.
•If the transmit modem READY LED still does not come on, power cycle the DW4020 by unplugging the power cord from the wall outlet or surge protector, waiting ten seconds, and plugging it back in.
•If the problem persists, contact technical support.
Receive modem READY LED 
continuously lit, showing that it is functioning
Transmit modem READY LED not lit
Figure 67: Transmit modem READY LED not lit
90
Appendix C • Installing the DW4020 Manually
