extreme 450e booting problem

[ahmed_Ahmed]

At the beginning it was a problem with my switch Fans
then Then the switch turned off
and i can't have an acces to my switch
i tried to booting the switch with this soltion
https://extremeportal.force.com/ExtrArticleDetail?an=000074969
but without result
If I try to install EXOS (summitX-15.3.3.5.xos) from bootrom it failed with the following error :

download: The image you attempted to load is either not a recovery image or it may be corrupted. Please try again.

[Ram3]

Looks like a hardware failure. Unable to upgrade from BootROM. Raise a GTAC case to process an RMA

[ahmed_Ahmed]

boot 3 doesn't work too

[Patrick_Voss]

Ahmed,

Based on experience and the fact that you have already tried to reload EXOS through the bootrom we believe this is a hardware issue. You can try to get into the bootrom and type in "boot 3" to see if the diagnostic partition is still active. If that doesn't work then I confirm what Brandon said.

[ahmed_Ahmed]

but can we assert that this is a hardware failure 