Facing TV Problems? Ask a TV Technician.
Well, you actually should do a little more troubleshooting than just replacing the SN board. You should check the power supply board to see if it's producing the 15 Volts DC that supplies the SN and SS boards, then see if the A board is taking that 15 Volts and creating the 9, 5, 3.3 volts on the A board along with powering the tuner . Checking the power supply should be easy as it's the one that the power plug goes directly to. Look at the troubleshooting chart showing what can cause the 10 blink code - then look at the location of the boards to get you started. Got a voltmeter?