[JT118]

I have now bought an identical one to this link but screen switches on but no digits, have chosen "1" in the software config. RX board, latest version software;

Are you connecting it to the RX board or do you mean WD board?
If WD board, what really happens?

It is RX v4.02 fully assembled board as bought off you recently.

Those ILIILI9341 TFT displays we are talking here are intended to be used only with the Wireless Display units (WD boards), they require 3.3V volt logic, and can't be connected to the RX board.

The RX boards also have support for a TFT display, but it must be a 1.8" 128X160 SPI TFT Display (ST7735 driver).
Anyway, as your RX board already have the flah memory, I don't recomend using a TFT display with it, just because you will loose the hardware data logger capability. Both can't be run at the same time.
Actually the better choise for the all RX units is a 20x4 serial LCD display.
There are already lots of info about this on the forum

You can also check the WeatherDuino Pro2 - RX 4.0x Parts List thread

Keep that display for a WD unit.

Like this hopefully:

http://www.ebay.co.uk/itm/141415310957