7 flashes suggests there is a fault on the video driver within the main board.
This type of fault will require the TV to be taken to a repair centre.
Replacement boards normally cost around £100, your then looking around £50 in labour, as such would suggest you put the money towards a replacement.
However if you want to look to get this repaired or at least a formal quote for repair, please provide me with your postcode and I can recommend a suitable engineer in your area.
Hi Steve, I havent heard back from you, if you have everything you need, please rate the service received using the star rating, so I can close the case.
Should you need any further assistance please advise how I can assist you further.
Hi Steve, so I can close the case please login and rate the service received using the star rating on the Just Answer page, should you need further assistance please let me know.