Moved into my new place just over a year ago, but have been plagued with no signal 29 errors.
Generally, they happen when the box has been switched off, and it then becomes impossible to get a signal back.
Anyway, I hadnt had a problem for a few months, but then it suddenly went strange when I was hoovering. (plug in different room, nothing else went wrong etc). So I switched on and off, and got error 29

I tried everything to get it working, installer menu, reconnecting leads into box, resetting various menus, switching leads over, turning on and off, taking the card out etc etc etc.
Eventually, after 3 days I decided to try a new lead from B&Q, and lo and behold..it was working again

(though only 1 feed has ever worked even though I have 2 in my flat)
Assuming that the lead was the problem, I didnt think that turning the box off would be a problem, but I was wrong. The same pesky message has appeared, and I have no signal again. Again, I have tried all of the above options, but it still has no signal.
Despite my research, it seems that not all error 29 can be fixed by resetting LNB, etc etc. The only consistency with my fault is that it happens whenever I turn my box off.
Any ideas..please