OK If they have the same lnbf as you -this is critical- if it is a new system it will probably be a triple, (if theirs is different from yours you can't check doing this method)try connecting your receiver to their dish. If it works, then your dish is the problem. If it does not then your receiver may need a refresh. Their are extra posts to connect to at the dish- just need coax and a power source for the receiver. By the way- which receiver are you using- a 600 series?
You could also connect their receiver to your dish and see if it works. Again, if it does then it is your receiver. Just try different strategies to eliminate possibilities.
If this system worked last year, then I feel it is either:
misaligned dish- they can be tricky- post must be vertical and receiver on the right channel- I think 252 for a triple- I don't use this since I use a First Strike meter which does identify the satellite.
receiver has lost its program and needs a hit.
The big difference from Shaw to Bell is that the lnbf is matched to the receiver by Shaw sending the correct mapping info to the receiver. Different lnbf's need different codes. They sell you a matched system. The problem arises when you try to hook up a receiver to an older dish with a different lnbf.
Also - using the receiver to align the dish is a snap with Bell- much more challenging with Shaw- it will work but needs patience. This is why I bought the meter- takes about 3 minutes to find the sat.
If you use a generic meter- you could be on the wrong sat as well.
Keep trying. There is a learning curve but worth it when it works. I practised at home before I left to make sure I could do it.
good luck. Hope this makes sense.