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LED Indicators Displayed During an OSM
Download
Understanding the LED Indicator Sequence in OSM Downloads
After a DHCT is connected to the RF network and AC power is applied, the
Bootloader monitors the download, verification, and installation of the new OS into
memory. At the end of the process (which might repeat until the DHCT receives a
valid OS download), the DHCT displays one of the following:
The Service Disconnect mode (brick mode) indicator (if enabled on your system)
The clock
The following table shows an example of an OSM download sequence of front panel
LED displays that appear after AC power is applied to the DHCT.
Note: The front-panel alphanumeric LED displays that appear on the Explorer
DHCTs may change for each stage of the DHCT software download process.
Therefore, in the following table, the LED displays that correspond to certain stages
of the download process may be repeated or skipped, as noted in the Description
column. In other words, the stages do not always occur in the order shown.
Alphanumeric
Stage
LED Indicator
1.
2.
3.
734375 Rev H
LED Indicators Displayed During an OSM Download
TV Monitor
Description
The "wave" appears each time the DHCT
resets. The DHCT is initializing and testing
the system. The wave provides a visual cue
as to when to press buttons to force
auxiliary functions.
The DHCT boots into the OS.
"Dancing dashes" that alternate between
the middle [ - - ] and outside [- -]
segments appear when the OS runs the
Guardian Mode application to receive the
upgrade. The image installs from the BFS
into internal DRAM.
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