You should search for the that is printed on your board, which might look similar to TP.RD8503.PB816_A21_IR_WEITU_AP_AL46D_003_20DF_0B_PNL_GENERAL_1366_768_REF56 . This level of detail is crucial for finding a compatible firmware.
You likely installed firmware for the wrong resolution. Re-flash with the correct resolution file. tprd8503pb816 usb software download top
Be careful with third-party “driver download” sites claiming to have the file — many bundle adware or malware. Always prefer: You should search for the that is printed
Use a USB 2.0 or 3.0 drive, formatted in FAT32 . formatted in FAT32 .