Hi,
Your converter is likely inadequate for the 1560W Blendtec motor.
1) the product was designed only for reactive loads (heaters) and to be used at only 15 minutes at a time (poor heat dissipation and/or under spec'd wiring?). More complicated loads draw more current
2) it looks too compact and priced too low to be adequate. Consider the size of this toroidal 2000VA transformer
http://ianamillar.com/blog/wp-content/u ... soTran.jpg
3) the converter power rating may not be the average power output capacity
4) the blender rating might not account for "power factor" inefficiency, meaning you'd need a higher rated transformer
Yet, some steps to aid diagnosis:
1) Switch power outlets to ensure the cause is not the outlet
2) Make sure the switchable socket prongs are fully extended, that there is electrical contact
3) Test with a smaller load to ensure the converter outputs something
4) Test the voltage output of the converter with a voltmeter (take caution)
Last thing you could do is confirm the specs of the blender; make sure current rating is 13 amps and freq. is 50hz vs 60hz.
I predict that you'll need to buy a much heavier (and uglier) counter-top model. At least that way you can use US power tools and gaming consoles at the same time!
I want a working Blendtec too. Let us know what happens.