Pixhawk bricked

I was uploading farmware to radiolink pixhawk 2.4.8 uploaded it two or three times. Then after that pixhawk got bricked. No sensor response. I tried many things to solve it, uploaded new firmware, tried with several versions of firmware. Deleted all files on SD card, updated bootloader but nothing is solving it. IO LED is on. Act LED is not on. Main light has stopped flashing, this light is off. Please help me

Try using GGroundControl to flash the Fmuv3 firmware.

Thank you for replay.

I try QGroundControl. And I will tell

If QGC doesn’t work, short the Boot button. This puts it into bootloader mode. Now try flashing a new firmware. (now on many 2.4.8s, this is made easier by making shorting the Boot button same as pressing the safety switch. If you don’t have a safety switch, manually short the correct pins).