Before it was 842 nd (it worked for almost a year), but after a thunderstorm it burned down and hooked the network card in the computer. Passed under warranty, promised to exchange for a new one. This 841 n bought as a replacement until they return that one. But what's the trouble, WiFi constantly disappears, it's not even possible to watch a YouTube video, then it will turn off, then it will connect. Can anyone suggest how to fix this problem. Thank you.
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