Before purchasing these parts please verify that you have the correct software. you can use the following procedure
Press the power button on the IDU for 3 seconds.
Hold the enter button in for 3 seconds or until it shows enter user menu.
Press select for yes, enter.
Press select for diagnostics, enter
Press select 3 times for ODU software version.  Enter.
To be able to convert it needs to be 1.04.18 or higher.
ie: 1.04.27 (example)
If you have the correct software ver. then you’ll need to purchase 2 listed items.
Here is the link for the replacement instructions
Replacement DISH® 1000 LNB Assembly