I have had a DIR-655 router for a few years now, but slowly over time the wireless output has gone down. I have tried changing parameters to only-g or only-n, rebooted, changed other parameters based on what I have read in some of the forums, but have not been able to restore the power. It has an ANT24-230 antenna, and the latest firmware update 1.35NA. Different devices all show the same thing, that even next to the antenna the strength is only 80% in spite of the fact that the wireless output is set to max.
Any comments would be appreciated, even though I have been working on this for a couple of months now, and am considering buying a new 11AC or 900N router if this is not fixable.