Q5 weak tuner

[Lola68]

Been reading threads that q5 cable receiver as a weak tuner is there anyone who could tell me symptoms of a weak tuner in these boxes
Reason for this is I can be watching say itv hd and picture will freeze then couple of seconds restart also I can then turn to say BBC hd where all working fine then turn back to itv hd and get nothing except black screen
press info on remote and signal strength level 100 db and signal quality 80 -85%
any one give some ideas as doing my head in

[loncell]

There's alot of factors that might point to other things before I would say it's def the Q5. Firstly your cables, make sure there all fine. Then there's anuators and splitters, make sure you take any anuators off , some will say don't do that but it works for me so remove.
Make sure you don't have some cheap and nasty splitter , get a decent one, then there's "How far from the bband is your Q5 ?" . If it's say front to back or your home then yes it will struggle.
The best way to get it right is, strip everything back , no splitters , no bband and test your BBC against your ITV then slowly add. If the problem is still there when you have a direct feed then it could be good old virmin turning your signal down in the box at the end of the road so you might need to buy a signal booster. Buy a KONIG signal booster they will sort your problem.
or
Take it round a friends/neighbors and see what happens on their TV, this way you get a better idea before you start messing at home.