Hi new info
I brought another Uno to try and add a new bootloader to my bad one
I took the Atmel IC from the old board and installed it in the new board to see if the IC was bad
I discovered there was nothing wrong with Atmel IC but with the old board
I replaced the old IC in the old board and got the same problem as before
I was fiddling with the board and suddenly the sketch that was on the IC started i.e. blinking a led in pin 12.
Couldn’t figure out what I had done to fix this removed power and reapplied power and had the same problem
Spent a long time trying to find a bad connection on the board when suddenly it worked properly again I had touched the component directly beneath the USB port as depicted in the pic.
When I remove power I get the original problem but as soon as I touched the parts indicated by the arrows with my finger or screwdriver the sketch starts to run
does anyone have any ideas how i can fix this or what is happening