How to restore the firmware of a Mitel 5324 SIP phone?

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Nikita Melikhov2017-07-12 11:24:17

SIP

Nikita Melikhov, 2017-07-12 11:24:17

Good day.
I managed to purchase 3 Mitel 5324 phones for trial
. Files for firmware were put in the tftp folder - BootIp5324Ttn.bin L2Boot53xxTtn8M.bin MainIp5324Ttn.bin sip5324ttnlang_en_US.bin sip5324ttntone_US.bin
The device showed the inscription "Flashing 100% Do not turn off" and that's it. When turned on, all buttons light up, and a white screen.
There are no requests for DHCP or TFTP.
There, the flash completely died, or is there a possibility of software recovery?
Share your experience, suddenly someone came across such models? There are already two such devices with similar symptoms, the third one is still alive.