What strange issues you have!
I configured my 740n v4.2 as repeater...well in atheros is client mode + virtual interface as ap.
Both with WPA2 mixed security.
Worked great at first! Fast, nothing strange.
The only bad are the leds. But thats all!
I have tried setting client mode with another AP for all the day, but still nothing. I have read different documentation but nothing works.
In status panel Ap's are conected but internet no works.
I don't read the dabyd64's last post. Is the same bug.
Do you think there is a difference between hw versions?, according to tp-link the only diference between wr740n v4.x and wr741nd v4.x is the detachable antenna, and also the only diference between subversions (4.x , 4.y, etc) is the firmware (software) version.
I am reading mixed results, as I said, I also have a wr841nd v7.2 (build r17201) and client mode works perfect, but that same build doesn't seem to work for people with hw version 7.1, and I kindda see the same patern here, wr740n v4.2 working ok, but wr741nd v4.3 having issues.
That seems very strange too. Usually the differences between same main HW versions (main version = v1, v2, v3, v4...) and different subversions ( v4.0, v4.2, v4.3)are small optimizations in the circuit layout, or small change in components for a cheaper build. But processor, RAM, and flash, if being the same, then I don't think it can be any problem.
And wireless is the same..I don't understand that you can do an AP in both versions, but client mode only working in one HW ver.
Are you trying both in the same scenario? Same main router, same security settings, same channel...
You could attach some images of the board of HW v4.3 to see if something is different
I'm gonna try right now.
Wait few minutes for results
Works like a charm.
For now I see fixed Leds and I also think I got better signal.
It was 32% quality, now is 37%... maybe is just casual.
Later I will try if client mode and WEP security issue was fixed too.
Btw, is not possible to get more than 18dBm from this hardware?