MIR4A 100M Global LED Configuration problem

I'm newbie here and just installed OpenWRT few days back on my MI Router 4A Global. I suddenly got my only WAN port damaged and OpenWRT saved me using one LAN port as WAN. My router is running fine. But something is poking me badly that the second LED that used to show me connectivity is no more working. And I'm finding no way out to fix it. Please help me with this situation.