Tkx bro. Tikak wede unanduwen karala goda danna puluwan dail ekak balanne machan... nathi nam danata weda karana USB boot ekath kela wei
Low level SD card read eke awulak thiyenne... USB boot karala SD card eka read karanna puluwan.. most probably SD card slot eke wenna one... ee nisa repair karanna puluwan wei kiyala hope ekak thiyanwa.. Boot parth Damage wela natiwa athi....
wena chip ekak aluthen bootable karala try kara da?
sd card slot eka replace karana eka nam loku case ekak nemei.
BTW I read about your issue. It looks like this is a common software problem.
there are some configurations to skip sd card boot, and some say this happened after a usb boot. this can be reverted
Also you can try to update EEPROM
since you can read the sdcard after boot, this is unlikely to be a hardware problem