If you connect your computer to the TL-WA701ND with lan, can your computer work ?

Yes of course, I can set it up via LAN, so I think that the WLAN part doesn't work properly (or is set up incorrectly).
I bought it from Amazon.de and I've read through all the customer's reviews. One said he was using his AP as a client, too, and also has these connection drops every 20-30 minutes or so.
On Amazon.co.uk someone said he has these connection drops, too, but every 60 minutes. He went to the LAN tab from the device to enable DHCP and it worked for him (I tried that, too, but it didn't work).

EDIT : The AP as client worked for either when DHCP was enabled/disabled.

I also have this problem and have tried the same things as you. If I can't find a solution in a couple of days I'm sending it back.

Yes, i having this problem too. Some of my laptops even can't get DCHP IP from it.
Wifi connection unstable, have to restart the router for about 5-6 times a day.
Is this a common issue of TP-Link product ?

This is really annoying issue. Hope TP-LINK can see our posts and find a solution to it. My TL-WA701ND V1 is working OK at the moment. I would like to share the setting here.
1. Network-->IP address:192.168.1.254, gateway: 192.168.1.1(my broadband router)
2. Wireless-->Client-->WPA-PSK, 8 digits password.
3. System tools-->Ping watch dog-, enable->Ip address: 192.168.1.1(broadband router)

With all these settings, others set as default, mine is working OK and I am considering to buy a second for my new TV.

Why would yours have a stable connection? I mean, your settings aren't changing much about stable connection....
You have a different IP (mine is automatic), you have a different protection (I highly doubt that his will have any influence on the stability at all) and the ping watch dog? I think that's only for being able to ping the device all the time to check it's functionality/ping.

This problem is still unsolved, and I am still wondering if it's the device malfunctioning or any setup any of us could've done wrong... (all the same mistakes?)

EDIT :
The device is not idling or having no traffic and therefore going offline/out of WLAN, I was watching something for 20-30 minutes and the connection dropped whilst I was watching.

ADDITION : I just tried plugging the TV to my network via a LAN cable.
I used my DLNA device and streamed a movie for 2hours+ and it didn't disconnect once. So that's another fact that the AP is the problem.
(all my other devices in WLAN are ok and have no problems getting disconnected either : 2 laptops, 2 mobile phones)

And I thought that this was some kind of tech support forum where TP's employees are going to reply.

hello,
This equipment is the worst I've had, and works for the worst.
I have installed 4 equipment, two of them as repeaters and all is lost every day, I have to disconnect.
Support solutions like me to scan the channels used, this is the kind of support that gives a cheap brand and some equipments that do not work.
Anyone have a solution for this?
I have all the equipment with the latest firmware.

Looks like I am not the only one who has this problem.
I am sending it back now. It's sad that it didn't work the way I wanted it to.

opozzum wrote

Looks like I am not the only one who has this problem.
I am sending it back now. It's sad that it didn't work the way I wanted it to.

I have a WA701ND (latest firmware) and i have suffering from same problems.
(Sometimes it works without any trouble for a week.)