"Check Multi-Switch" Error on SWM System

[lagman]

I started service with 2 TVs about 2 months ago, and everything had been fine up until about a week ago, when I noticed one of the TVs would get blocky at times. It seems to have gotten worse.. Now at times it cannot even lock the signal. A couple times, I've seen a message pop up saying my multi-switch is not wired correctly. The problem TV does have a longer cable run than the other TV, and the installer chose to use the existing wiring in the house instead of running his own line.

What could be causing this problem to occur? Seems like if the multi-switch was wired incorrectly, I would have seen the error a long time ago. Maybe bad cables?

Thanks,
Dan

 

[jdspencer]

Please post your receiver models.
Also, what dish/LNB is being used?

 

[lagman]

Receiver: H20-100
Dish: Slimline 3S (SWM)

 

[jdspencer]

Okay, try connecting the problem receiver directly to the dish. Bypass the SWM splitter. If the receiver starts working, then try a different output from the splitter. Also, check the coax going to that receiver for bad connections. Have you checked your signal strength? And compared them between receivers?