Hi,
6 times standby red light blinking shows problem with G1 Board (power supply) that does not output +17V and/or -17V
You need to replace G1 Board in your Sony KDF-70XBR950 tv, it is located next to right side of connections board if you look tv from its rear. G1 Board is mounted vertically and has 11 connectors to be unplugged.
Let me know if you need part number info of G1 Board if want to replace it by yourself.
Below exploded view shows G1 Board location in tv that will help you.
Thanks.