https://community.extremenetworks.com/t5/extremeswitching-eos/x435-not-booting-after-firmware-upgrade/m-p/120321#M2631 <P>We just received a brand new x435 24p 4s and I attempted to upgrade to&nbsp;summitlite_arm-33.4.1.15.xos via usb and rebooted. Now the sys light will not come on and the fans are running high... Any suggestions on how to recover?</P><P>I've done that before on another switch and it worked fine</P> Fri, 19 Sep 2025 18:39:08 GMT Shaquille 2025-09-19T18:39:08Z https://community.extremenetworks.com/t5/extremeswitching-eos/x435-not-booting-after-firmware-upgrade/m-p/120321#M2631 <P>We just received a brand new x435 24p 4s and I attempted to upgrade to&nbsp;summitlite_arm-33.4.1.15.xos via usb and rebooted. Now the sys light will not come on and the fans are running high... Any suggestions on how to recover?</P><P>I've done that before on another switch and it worked fine</P> Fri, 19 Sep 2025 18:39:08 GMT https://community.extremenetworks.com/t5/extremeswitching-eos/x435-not-booting-after-firmware-upgrade/m-p/120321#M2631 Shaquille 2025-09-19T18:39:08Z https://community.extremenetworks.com/t5/extremeswitching-eos/x435-not-booting-after-firmware-upgrade/m-p/120588#M2632 <P>It sounds like the upgrade failed or was interrupted, which is not common.</P><P>&nbsp;</P><P>You can attempt this process to recover:<BR /><A href="https://extreme-networks.my.site.com/ExtrArticleDetail?an=000092616" target="_blank">https://extreme-networks.my.site.com/ExtrArticleDetail?an=000092616</A></P><P>&nbsp;</P><P>If that doesn't work, reach out to GTAC for an RMA.</P> Tue, 28 Oct 2025 19:08:42 GMT https://community.extremenetworks.com/t5/extremeswitching-eos/x435-not-booting-after-firmware-upgrade/m-p/120588#M2632 Gabriel_G 2025-10-28T19:08:42Z