The SD40 has DVI output which supports DVI and VGA signal types. If you. TV supports VGA or DVI then you need the right cable.

Take care with the pin layout, if you TV has a DVI input it might be digital only and the DVI connector will not have the analogue bits and if you get a fully populated DVI cable with both digital and analogue pins it will plug into the SD40 but not the TV!

For the SX9000 you need a USB to Video adapter and make sure it is on the Yamaha approved adapter list because the SX (and the Genos) only support a specific limited set of chipsets.

If your TV is HDMI I think you'll need another adapter to convert DVI or VGA to HDMI.

I have chained USB to VGA to HDMI with my SX900, a bit messy but it works fine.