DM500s Ethernet Problem

Hi.
I have DM500s clone Ethernet Problem , internet connection dosnt work with dm500s and i want to repair this box so please some one assist me to solve this issue .
I will be happy if some one can tell me parts names and place to buy from.

Many thanks

cheaper buying another box mate they are 10 a penny lol

well i have another box but i just want to learn few things that's why want to buy parts so i can try to repair ....
i got another tutorial , please check attached file.
i asked some from china to provide me those parts (according to tutorial) but he asked me about dimension of those parts but i have no idea about dimension , just googeling to find out some information about dimension of parts.

Please help if some knows.

View attachment DM500_Mods_LAN_repair.pdf

Many thanks