Hi, I just put up a second tv a new samsung with built in  freeview and wired it up myself using a 2 way splitter off the uhf aerial. 

Most channels work fine on both tv's except for 3, 4, c4 and 3+1. 

Those channels sometimes do work and sometimes have broken sound and really bad picture.

If one tv is on channel 3 the other tv wont get signal at all for that same channel and vise versa. All other channels are fine apart from 3, 4, c4 and 3+1

For example I hooked the new samsung up yesterday and all channels were good.  I turned that tv off and turned on the old tv and couldnt get channel 3 or 4. This morning I turned on the old tv and all channels were good again but the new tv had no signal for channel 3 or 4, the other channels were still fine.

I had a play with the aerial today and got both tvs working on all channels but tonight it has gone back to either only one tv working on channel 3 and 4 or neither of them getting these channels?

Can someone help?