P660r-F1 Adsl2+ Ethernet Compact Series Router

this is a d-link DSL g6 240 ADSL to modem router switch and wireless access point all in one unit and the procedure that I'm going to perform troubleshooting and repairing this device is applicable generally to all brands of switches routers and other internet access points so with this model I had it for a few years and I already replaced two capacitors inside recently it began to exhibit a particular problem of not being able to connect to the internet from any of the attached computers through the Ethernet wire and I tried to troubleshoot it and found out that through the wireless connection I was able to access the internet but through the Ethernet wired connection I couldn't I try to reset the router and that didn't help so I decided to check the router by connecting different computers directly to the Ethernet port and none of them could connect to the internet well through the wi