i have a long L shaped apartment and my imac and router are at the top of the L, in the lounge, and my bedroom tv and mac mini which i use as a media player is at the right most point. in between is the kitchen so wifi signal in bedroom is patchy overall, and since the tv is in the far corner, theres no signal there. bought a D-Link extender. originally used it as a repeater, but had lots of problems, mainly looking back on it, that the bedroom mini had problems where it connected but didnt get internet, wifi with an ! through it. cable guys ran cable into the bedroom but could only take it to back wall, sort of half way along the shorter line of the L. so extender still used but with cable going into the back of it. set up by cable guy. all fine for a few months. mind you i don't use it as often as i thought i might. from last week, lots of connection problems, which were originally problems with the ISP, i phoned them and they said they were working on our line that day. but when it came back, some machines would connect, some wouldn't. as it happened, due to the wife's colleagues all getting work ipad2 s and me being asked to set them up, we had tons of machines in the apartment. my iMac, iPad, iPhone, wives macbook, ipad mini, iphone. i didnt even bother going to the bedroom to try to connect the mac mini. tried for about 5 hours. my iMac would connect. some of the new iPads would connect, some wouldn't. i'd unplug the router and my iPad would work, but wives wouldn't. unplug it again and her laptop would work. a fw days later, all work iPads gone the next morning, still my computer worked, wife's wouldn't. it would be connected to the wifi, sometimes with a normal icon, sometimes with the exclamation through it. final straw, on saturday, so 5th day, i unplug the router and plug it in again hoping to get wires macbook to connect. then nothing will connect. phoned cable company. guy comes out, says there hasn't been maintenance work for a few days, all should be fine. tests everything, no problems at his end, but nothing will connect. he unplugs the cable that runs to the range extender and straight away my computer works, they all do. plugs in the range extender, everything still works. later that night, wife has problems connecting macbook, i switch off range extender, all works all of this was in the lounge, within 2 metres of the main router, no where near the range extender.