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Serial Connection USB to TTL Unable to get cfe prompt

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mohsha

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I have a EA6900 with xvortex cfe and it is stuck in boot after a firmware upgrade. I am unable to put the router in rescue mode to use mini web server to upload firmware. I tried serial connection but I am not getting cfe prompt to erase nvram and reflash. I tried Ctrl C as well as space and always end with the message "Waiting for wps button release..." The physical WPS button is not pressed or jammed. What options do I have now?

Digital core power voltage set to 0.9375V
Decompressing...done
Detect CPU turbo button...

CFE version 6.37.14.126 (r561982) based on BBP 1.0.37 for BCM947XX (32bit,SP,)
Build Date: Sat Jun 22 23:49:18 MSK 2019 (Vortex)
Copyright (C) 2000-2008 Broadcom Corporation.

Init Arena
Init Devs.
Boot partition size = 262144(0x40000)
DDR Clock: 400 MHz
Info: DDR frequency set from clkfreq=1000,*800*
Warning: invalid DDR setting of 800 MHz ignored. DDR frequency will be set to 40 0 MHz.
et0: Broadcom BCM47XX 10/100/1000 Mbps Ethernet Controller 6.37.14.126 (r561982)
CPU type 0x0: 800MHz
Tot mem: 262144 KBytes

CFE mem: 0x00F00000 - 0x01796420 (9004064)
Data: 0x00F4EA50 - 0x00F4EF48 (1272)
BSS: 0x00F4EF58 - 0x00F94420 (283848)
Heap: 0x00F94420 - 0x01794420 (8388608)
Stack: 0x01794420 - 0x01796420 (8192)
Text: 0x00F00000 - 0x00F45150 (282960)

Committing NVRAM...done
Waiting for wps button release...
 
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