Bad Batch of LNBs? How to tell?

[Tweakophyte]

Hello-

I read on another thread there is a bad batch of LNBs that are temperature sensitive. Is there an easy way to tell?

I recently had the guts of my system upgraded via the 721 promotion. They swapped out the legacy LNBs and SW21 for a DP quad and a DP34. Now my 301 occasionally has trouble finding the Fox New Channel (205), which I believe is #16 on 119. How can I tell if this is being caused by a bad LNB?

Unfortunately, I am not 100% sure if when the 301 could not find Fox News if the 721 had trouble. The problem with the 301 is on several channels (same errorr... can't find a certain transponder), but that has not happened on the 721. Is the 721 better at handling weaker signals?

Thanks,

 

[Mike500]

The only well know batch of bad lnbs were the DishPro twins, Lot Code DSS9601, Made in China. The lot code is on a small silver colored sticker right in the center below the lnb signal input cover.