This is from
[Link: keohi.com]"Here are some tips for this STB.
Version A05.10a upgrade is now being transmitted by DirecTV. There are no significant functional changes visible to those who have received it thus far. Unfortunately, neither RCA nor DirecTV are forthcoming about this last upgrade. Note that a few DTCs have been negatively affected by the upgrade, e.g., some functions are slower after the download.
The last significant firmware is 4.037. This version corrects the retrace timing whic allowed for non-RCA sets to work much better with the DTC. Via an on-screen menu, you can now center the image without having to go into your set's service menu. This update also prevents the older DirecTV H cards from being used with the receiver. It will only accept the newer HU cards.
Previous firmware versions are as follows
* Version 372 - original firmware; DSS H card-compatible; all 900 range local channels available
* Version 4.0B - first firmware upgrade; DSS H card-compatible but 900 range local channels disabled
* Version A04.37 - last significant upgrade; no longer compatible with DSS H card; works with HU cards only"
You would like to have A04.37
More info at the above link as to what it will do for you.