In survey button you can see any SSID?

Czy w konfiguracji repeater widzisz jakieś sieci?

Yes, in quick setup I see networks and I choose the one I need. In next step I setup needed security. After router reboot I can see that network is boosted (from 30 to 90%), but I can't connect with my laptop or smartphone to repeated network. Unfortunately router-repeater doesn't assign IP address.

Tak, widze wszystkie sieci, nastepnie wybieram ta ktora chce wzmocnic. W kolejnym kroku ustawiac zabezpieczenie lub dla otwartej wybieram brak. Potem urzadzenie wzmacnia siec, poniewaz sygnal 30% wzmacniany jest do 90%, ale przy probie polaczenia z laptopa czy smartphona niestety nie przyznaje IP i nastepuje timeout.

What do you have in repeater status after connection?
Co masz w statusie repeatera po połączeniu? Zabezpieczenia poprawnie wpisujesz?

What do you mean "status after connection" ? I can't connect to network/repeater when when it's set to repeat network mode, because it doesn't assign IP to connecting devices. I can only reset (with physical button) and connect via default tplink settings to try setup as repeater once again.

Nie bardzo wiem co masz na mysli, poniewaz nie udaje mi sie polaczyc do routera po ustawieniu go jako repeater, poniewaz w tym trybie nie przyznaje laczacemu sie urzadzeniu IP. Moge jedynie zrobic fizyczny reset i zaczac ustawiac jeszcze raz.

You try make wired connection with your router. What is your LAN address on router?
Spróbuj połączenia kablowego z twoim routerem. Jaki masz adres IP na routerze?

When I try connect to router (when it's paired and set as repeater) it's the same problem as when I try via wifi connection: "setting up ip address" forever, until timeout. I can connect only after reset router to default settings.

Probuje, ale jest to samo co przez wifi. Nie ustawia adresu ip.

You have to write addresses in your computer network card because probably DHCP on router is disabled (switch off).

Musisz wpisać jakiś adres do karty sieciowej (z puli routera) aby móc się z nim połączyć przez przeglądarkę.

As I understand, router in repeater mode is passing all DHCP queries to root router to be transparent and doesn't assign IP's itself, but only per answers from root router. I think this moment fails on my repeater (tested on many wifi networks open and secured).
I'm doing testing with OPEN network now. Orginal router assign me IP 10.1.10.24 and has 10.1.10.1 address itself. When I start repeater and put a wire into laptop it start to set IP address automatically, but fails. When I set 10.1.10.24 on wire interface of laptop and then ping 10.1.10.1 it doesn't work:
PING 10.1.10.1 (10.1.10.1) 56(84) bytes of data.
From 10.1.10.24 icmp_seq=1 Destination Host Unreachable

Wydaje mi sie, ze w trybie repeater router przekazuje wszystkie zapytania DHCP do nadrzednego routera i przydziela je potem w/g odpowiedzi i ten moment chyba nie dziala w moim MR 3040. Nie mam pojecia jak sie z nim polaczyc w trybie repeater i jaka ewentualnie pule adresu ustawic. Obecnie testuje na otwartej sieci, z routerem ustawionym na 10.1.10.1 i ktora przy poalczeniu bez repeatera daje mi 10.1.10.24. Kiedy wlaczam repeater i probuje laczyć sie po kablu ustawienie reczne 10.1.10.24 nic nie daje. Nie moge sie polczyc z routerem po jego adresie (o ile taki ma) 10.1.10.1:
PING 10.1.10.1 (10.1.10.1) 56(84) bytes of data.
From 10.1.10.24 icmp_seq=1 Destination Host Unreachable

But you have some problem with connection in this mode (we have to localize issue). Oryginal IP on this device is 192.168.0.1 and you have to write this addrressation in your computer
For example 192.168.0.100 and mask 255.255.255.0 and next try to connect by the cable.

Masz jakiś problem z połączeniem w tym trybie (trzeba je zlokalizować). Orginalne IP dla twojego routera to 192.168.0.1 więc wpisz adres z tej puli do karty na komputerze i spróbuj połączenia kablowego aby sprawdzić co masz w statusie MR3040.

ok, thanks. I'm able to connect via wire with router in repeater mode using 192.168.0.1 IP (192.168.0.100 on my card) and I can see status now, it seems to be fine:

Status
Firmware Version:
3.14.2 Build 120822 Rel.40902n
Hardware Version:
MR3040 v1 00000000
Wired
MAC Address:
90-F6-52-80-12-0E
IP Address:
192.168.0.1
Subnet Mask:
255.255.255.0
Wireless
Operation Mode: Repeater
Name (SSID): TABAIBA
Channel: 11
Channel Width: Automatic
MAC Address: 90-F6-52-80-12-0E
Traffic Statistics
Received Sent
Bytes: 1308 13271
Packets: 21 126

Dzieki, udalo mi sie polaczyc z routerem po kablu i oto status w trybie repeater, ktory wyglada chyba poprawnie:

Status
Firmware Version:
3.14.2 Build 120822 Rel.40902n
Hardware Version:
MR3040 v1 00000000
Wired
MAC Address:
90-F6-52-80-12-0E
IP Address:
192.168.0.1
Subnet Mask:
255.255.255.0
Wireless
Operation Mode: Repeater
Name (SSID): TABAIBA
Channel: 11
Channel Width: Automatic
MAC Address: 90-F6-52-80-12-0E
Traffic Statistics
Received Sent
Bytes: 1308 13271
Packets: 21 126