Arduino Nano Pin Soldering issue

Hi All,

I have just soldered header pins to my Arduino Nano for the first time.
I have not soldered on the ICSP (6 pins) as I will not be using them.
Seemed to go well but when I plugged it in, the green led is on and red led next to it is flashing (not sure if the latter means anything). Then when I tried loading a known good sketch I get the error below.
I have tried changing from ATmega328p (old bootloader) to just ATmega328p to no avail.
Any help would be much appreciated.

Arduino: 1.8.12 (Windows 10), Board: "Arduino Nano, ATmega328P"

Sketch uses 7992 bytes (26%) of program storage space. Maximum is 30720 bytes.
Global variables use 571 bytes (27%) of dynamic memory, leaving 1477 bytes for local variables. Maximum is 2048 bytes.
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 1 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 2 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 3 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 4 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 5 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 6 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 7 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 8 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 9 of 10: not in sync: resp=0xb5
avrdude: stk500_recv(): programmer is not responding
avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0xb5

In cased this will help others with similar issue, I have found the answer here

It was just a case of using the correct search words to find the answer.

As I must have a Chinese Nano (red led) from UK supplier I needed to load a driver.

The Nano uses a FTDI chip, so you must install the FTDI drivers in order for OSX to recognize it.

http://www.ftdichip.com/Drivers/VCP.htm

All credit for this to 'cmiyc'