Unfortunately defective after the fourth use

I've owned several simple rice cooker, and so far they have reliable and good works. This one has prepared two times good rice, twice muddy rice (which may have been due to the variety of rice), and from then it was broken: The fifth time he could no longer be turned on. While the switch is down, but the warning light does not come on, and the content will not be warm. With such a simple technique I had more longevity expected.