I got a genuine Ardunio uno that i may have bricked when a pot got shorted.
Changed USB port no change.
First the L was solid on bootup and did not blink when reset.
Loopback test failed.
Changed the Large chip and the L led responds as normal but i still cant upload, Loopback test still fails but it fails on another working clone board so not sure what the issue is.
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0x0b
avrdude: stk500_recv(): programmer is not responding