Have Cracked it was caused by a duff receiver tried another and all ok Phew thanks for all the help though

I agree with Dave 967
What receiver are you using I think the only ones you can use areGR3E, GR3F, R6B,R6C and R9B that have the same protocol as the transmitter?
If you plug the Bind Plug into the battery socket and a 6 volt battery into channel 3 does the red light come on and flash with the transmitter turned off. If it doesn’t
that would point to a receiver problem.

Hi Stephen
Are you able to post some pics of both your Tx and Rx ( showing the type and pin connections)? I ask as it is possible your particular Tx and Rx are not compatible or possibly, faulty. If this was a recent purchase I would go back to the retailer for their advice.
As a matter of interest have the Tx and Rx worked and bound with other models?
dave976

I have done all that and still it will not bind

Hi Stephen
There is a manual on line for this Tx. (see pdf file attached)
Page 8 explains the process. Basically you use the binding plug in the battery slot of the rx and a rx battery in any of the other slots on the rx. The red led should be flashing on the rx (it's in bind mode). Press and HOLD the bind button on the TX and switch on. The red Led on the Rx should go solid (binding complete). Release the bind button on the tx. Remove the binding plug from the rx and reconnect the battery to the battery slot on the rx. If the Tx is switched on the rx red Led should be solid (bound to Tx). Connect a servo to each channel and check that all the controls work. If not disconnect and switch off. Repeat the above binding process.
dave976

As RogerA1 said... on most 2.4 ghz systems, the transmitter can over power the receiver if set too close. Move your transmitter at least six feet away from your receiver and try to bind.

try looking at this its a full report on flysky tx rx

Just found the same link. Looks like the guy in the video not 100% at first.
Have you tried moving the transmitter a few feet away from the receiver. On Spektrum if they are too close sometimes it won’t bind.

Assuming you mean binding transmitter to receiver? Can you tell exactly what transmitter and more important what receiver you have and how your receiver is powered
Have you followed this information on this link
https://www.google.com/search?q=flysky+fs-t4b+binding&sca_esv=560351168&sxsrf=AB5stBi-cgDKFs18kWrTug8A3I-HXvOplw%3A1693068209521&ei=sSvqZJi5H4-ygQby97fQCQ&oq=Fly+sky+FS+T4b&gs_lp=Egxnd3Mtd2l6LXNlcnAiDkZseSBza3kgRlMgVDRiKgIIADIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwAzIKEAAYRxjWBBiwA0jLIFAAWABwAXgBkAEAmAEAoAEAqgEAuAEByAEA4gMEGAAgQYgGAZAGCA&sclient=gws-wiz-serp