I get the "bad firmware header magic" error message when i try to upgrade T300 AP from 100.x to 104.x

[michael_brado]

I don't know what message you mean, but suggest a factory default and try again?

[monnat_systems]

re-download the firmware file.. may be its corrupt..

[hyosang_choi]

Sometimes the msg is shown on AP.

Factory-reset and reboot, then try upgrade again. 

[lefhoko_radisak]

i did factory reset and tried downloading the firmware file again but the message is still coming up on the AP