My routers was come back from rma because I have problems with the ether1 port.

I thought that only the router having the problem. Now I am having a new router back from the rma.

When I am pluging the wireless card and connecting from the winbox the router is disconecting all the time. Then I removed the wireless card and the router stoped restarting.

Because I am 99% sure that also the wifi card has problem I started this topic to make it 100% and buy a new one.

are you loging to router with MAC addresses?

@hlekat
Check your Power Supply Unit

HTH,

are you loging to router with MAC addresses?

I pluged them all again cables and power suply etc from the beginning and then in worked ok.
To be honest I haven't understant yet were was the problem. So I assume that the problem is solved.