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Hi can some one help me..
i recently purchased tp link archer d9 for my office to upgrade my old tp link router

i have several wired (LAN) connected devices and not planing to move it into wifi .

the problem is that the wifi connected device can not ping or access any of the wired(lan) connected device but the wired (lan) connected device could ping the wireless devices

NOTE: no configuration was change on the PC only on the router and if I reconnect to my old modem/router every thing goes back to normal

can some some help me troubleshooting this archer d9...i had a headache fixing it

i have upgraded the firmware to the latest one i can found at tp link website