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Well first I would try to hook up the old netgear back up. Even if the problem didn't occur with the Netgear "then" it may "now". Really sounds like the wireless antenna on the printer is kicking out so we have to rule that our first. If the problem re-occurs after 12hr with the Dlink, then I would say run the Netgear for 24 and see if it happens. If not, could be a issue with the security and the printer waking from Idle. Check out this thread. Seems similar. Its amazing what Google can find. :-)"Final update, the printer works and logged in fine this morning. The SSID security settings that work are:WEP and also WPA-PSK [TKIP]"But to be clear, since this is isolated to one device, its more a printer issue then a router issue. May want to try the Printer's forums if that solution doesn't work.
I highly doubt the DIR-655 is incompatible with every Lexmark printer. But if you feel that way, buy another router. ::shrug:: We are under no responsibility to fix your problem. We gave you our best advice, if that doesn't work, then I am sorry. Have a good day.
Did you connect up the old G router as an AP and see if the printer remains connected there?
That is a power saving problem with your printer, not the 655 router.Review this for your older router:Turning a router into an AP.