Device is not coming up after upgrade executed.

No activity on console seen & device went down with blinking green colour LED.

Device is not coming up after upgrade executed.

No activity on console seen & device went down with blinking green colour LED.

1. Power-cycle should get the devices in working state with target code.

2. If device remains down post power cycle, not responding to console then try making USB format install.

Article to perform USB Format install: 

https://supportportal.juniper.net/s/article/EX-QFX-Procedure-to-format-install-QFX5K-device-using-a-USB

https://supportportal.juniper.net/s/article/EX-How-to-format-install-EX2300s-and-EX3400s-via-USB

https://supportportal.juniper.net/s/article/ex4100-f-usb-format-install

https://supportportal.juniper.net/s/article/EX4400-Format-Install-Procedure

3. If still not then Create RMA with help from TAC.

2024-08-11 : Article Created

2026-10-01 : Updated and Externalized.