Keep losing connection

[black mirror]

Now and again i lose my broadband connection. I have 2 pc connected by a router and it just loses the connection. I have also noticed that when this happens i also lose the monitor. It wont switch on.
No amount of restarting helps i have to turn power off at the wall and on again.
I have this error in event viewer

Product: Windows Operating System
Event ID: 1002
Source: Dhcp
Version: 5.0
Symbolic Name: EVENT_NACK_LEASE
Message: The IP address lease %1 for the Network Card with network address %2 has been denied by the DHCP server %3 (The DHCP Server sent a DHCPNACK message).

[Sirkent]

A DHCPNACK generally indicates that a computer has requested an IP that is outside of the DHCP server's range. It's more than likely that the specified subnet is incorrect.

However, that could well be a side effect of another problem. A network issue like that should not cause a full blown system crash/freeze like you are experiencing.

When you say 'no amount of restarting helps', do you mean that the monitor doesn't come back on when you reset? That would point, quite possibly, to a general hardware problem.

[G_Dem]

A DHCPNACK generally indicates that a computer has requested an IP that is outside of the DHCP server's range. It's more than likely that the specified subnet is incorrect.

However, that could well be a side effect of another problem. A network issue like that should not cause a full blown system crash/freeze like you are experiencing.

I agree. I looked into DHCPNACK messages recently and found that they can cause lock ups. A work around would be to assign the pc a static IP address. If you dont want to do this you could try to update the router's firmware to the latest.

[black mirror]

Thank you for your suggestions,i will look into them