# RB5 Keeps Bricking

Source: https://forum.modalai.com/topic/1052/rb5-keeps-bricking
Category: Development Drones (https://forum.modalai.com/category/44/development-drones)
Tags: rb5
Posted: 2022-06-23 21:02:09 UTC by Cody Graham
Replies: 1 · Views: 633

## Cody Graham · 2022-06-23 21:02:09 UTC

Hello,

I have an RB5 which I've connected to many times through ADB and SSH. I exited an ADB shell one day, changed no wiring, then a short while later, I tried to open the shell back up using `adb shell`, only to find that there were no longer any recognized devices. For a few days, it seemed spotty on whether or not the RB5 would be recognized. Eventually, I couldn't connect at all. After talking through email with a contact from ModalAI, I tried booting into fastboot using [these instructions](https://docs.modalai.com/Qualcomm-Flight-RB5-system-image/), and I had errors due to /data/modalai and /home/linaro/eeprom/parameters not existing. I was able to get the camera calibration and test file from the ModalAI contact, and I flashed the RB5 successfully.

A few minutes later, I was getting ready to start a stream on the RB5 and I ran `adb shell`, only to get the error again: No devices/emulators found. I'm now back to before: I can't connect to the RB5 (using the same USB and power block as a few minutes prior when it worked). I also tried the fastboot instructions multiple times, and have not had any success.

Does anyone know why I might be unable to connect again?

## Reply by tom (ModalAI staff) · 2022-06-23 21:06:47 UTC

@Cody-David-Graham Thank you for moving over here! Will pass this along to the team.