Lost connection on router

Question

Iron

Strange situation, I don't even know which way to go.
The home computer is connected by cable to a NETGEAR WNR3500L router (running on default firmware). Another seven devices are taken from the router via Wi-Fi. I recently changed the motherboard on my desktop computer. Now, when the stationary computer is turned off, the router loses the connection to the provider. But if you turn on the desktop or pull out the cable from it, the connection is established almost instantly. I updated the firmware on the router to the current one, changed the cable. What could be the problem?

Answer 1

Or maybe it's still in the computer, how about updating the BIOS, + by turning off all sorts of Wake-on-LAN if not required. Plus, there may be a hardware problem, while the option, to check, is to put a switch in the gap, if any, for “galvanic isolation”

Answer 2

carefully check the firmware settings, although most likely just update to the latest.

Answer 3

Another good idea would be to check the power supply of the router itself.
From experience: there was an eight-port switch, powered by an uplink. When connecting the fifth subscriber, it simply turned off. Worked great with four. Moreover, it does not matter which of the subscribers you turn off. Four work, five don't.

Answer 4

BP router, I almost had it. Or dried capacitors of the router itself.