Teletext on Freeview

[garysmith]

I have freeview and Sky on my main tv and the freeview teletext is almost immediate.
The problem I have is with two other separate tv's that have built in freeview; Teletext takes forever to appear, then even longer to go to requested page.
Also both tv's regularly flash up a blue screen with no "no signal" on it, when seconds before it says 100% signal.
A technician, who said there was no problem with the reception, has replaced one of the tv's, yet the problem continues to happen.
I use the two tv's as much as I use the main set and this is becoming a huge problem.
Any ideas?

[garysmith]

Sorry, should have said the main tv is also built-in Freeview.

[garysmith]

Thanks for the reply, I'll try later.

[garysmith]

Been up in the loft and currently there are 6 cables coming out of one booster attached to the aerial. I presume this is overload!!!
I havent got a meter to test reception, but reception on the two Freeview tv's says 100%.