@Gangadhar1 Hi. I was unable to resolve the problem with the extender. I had purchased it through Amazon Australia. I returned it for a refund because there was clearly a problem with it. Instead I...

@buxter Hmm...I was premature. Less than five minutes after changing the settings and there seeming to be no conflict between the main router (TP-Link VX220-G2v2) and the TL-WA850RE Extender, the...

@buxter I had the same issue with a TL-WA850RE. Drove me nuts. I followed the clues provided by @jesperk2 and this resolved the situation. - Turned off DCHP Server on the Extender - Left the main...