All efforts that I tried did fail. However following the TFTP process allowed me to upload a new image. The WAP is up and running. Thank you.
Well... once again I spoke to soon. The TFTP process has allowed me to shift between stock firmware and RMerlin firmware. In both cases neither radio port is operational. I can configure both radio ports using the web interface and all appears good but the radio interface appears not to be broadcasting (I am not hiding the SSID). At least I am back to the original problem where the router is working in the AP mode and anything connected to the wired interface works but neither radio _2g nor _5g are functional.
With that said, it appears to be a hardware problem within the unit. This was purchased as a refurbished unit that is supposed to be still under the 90 day warranty. We shall see as I am working the RMA.
The one positive thing is that I did learn quite a bit (.e.g. NVRAM and firmware recovery). I am wondering if there is a list of sequences that can be applied besides holding either the Reset or WPS buttons during power cycling?
Here is a list of 'ps' commands, while in AP mode, from both Stock and RMerlin firmware's once the system is up:
RT-AC3100 Stock firmware 'ps' output:
PID USER VSZ STAT COMMAND
1 admin 6264 S /sbin/preinit
2 admin 0 SW [kthreadd]
3 admin 0 SW [ksoftirqd/0]
4 admin 0 SW [kworker/0:0]
5 admin 0 SW [kworker/u:0]
6 admin 0 SW [migration/0]
7 admin 0 SW [migration/1]
8 admin 0 SW [kworker/1:0]
9 admin 0 SW [ksoftirqd/1]
10 admin 0 SW< [khelper]
11 admin 0 SW [kworker/u:1]
53 admin 0 SW [sync_supers]
55 admin 0 SW [bdi-default]
56 admin 0 SW< [kblockd]
111 admin 0 SW [kswapd0]
158 admin 0 SW [fsnotify_mark]
166 admin 0 SW< [crypto]
240 admin 0 SW [mtdblock0]
245 admin 0 SW [mtdblock1]
250 admin 0 SW [mtdblock2]
255 admin 0 SW [mtdblock3]
277 admin 0 SW [kworker/0:1]
280 admin 0 SW [mtdblock4]
283 admin 0 SW [kworker/1:1]
285 admin 664 S hotplug2 --persistent --no-coldplug
497 admin 6248 S console
499 admin 1504 S /bin/sh
508 admin 0 SWN [jffs2_gcd_mtd4]
512 admin 1488 S /sbin/syslogd -m 0 -S -O /tmp/syslog.log -s 256 -l 6
514 admin 1488 S /sbin/klogd -c 5
588 admin 6256 S /sbin/wanduck
591 admin 984 S protect_srv
596 admin 984 S protect_srv
597 admin 984 S protect_srv
602 admin 1192 S dropbear -p 3626 -a
630 admin 6256 S wpsaide
632 admin 1524 S nas
637 admin 1072 S /usr/sbin/dhd_monitor
5494 admin 2052 S avahi-daemon: running [RT-AC3100-9950.local]
5495 admin 6604 S httpds -s -p <port>
5497 admin 1500 S crond
5498 admin 1216 S /usr/sbin/infosvr br0
5499 admin 6296 S watchdog
5500 admin 6256 S sw_devled
5504 admin 6256 S ots
5507 admin 1196 S lld2d br0
5523 admin 6256 S disk_monitor
5524 admin 6256 S bwdpi_check
5525 admin 6256 S erp_monitor
5545 admin 0 SW [khubd]
5712 admin 6256 S usbled
5713 admin 2252 S u2ec
5714 admin 1288 S lpd
5715 admin 2252 S u2ec
5716 admin 2252 S u2ec
6075 admin 1464 S networkmap
6083 admin 1260 S dropbear -p <port> -a
6084 admin 1504 S -sh
6087 admin 1492 R ps
13607 admin 6256 S ntp
13620 admin 1504 S udhcpc -i br0 -p /var/run/udhcpc_lan.pid -s /tmp/udhcpc_lan
RT-AC3100 ASUSWRT RMerlin firmware 380.65_4 'ps' command:
PID USER VSZ STAT COMMAND
1 admin 6340 S /sbin/preinit
2 admin 0 SW [kthreadd]
3 admin 0 SW [ksoftirqd/0]
4 admin 0 SW [kworker/0:0]
5 admin 0 SW [kworker/u:0]
6 admin 0 SW [migration/0]
7 admin 0 SW [migration/1]
8 admin 0 SW [kworker/1:0]
9 admin 0 SW [ksoftirqd/1]
10 admin 0 SW< [khelper]
11 admin 0 SW [kworker/u:1]
59 admin 0 SW [sync_supers]
61 admin 0 SW [bdi-default]
62 admin 0 SW< [kblockd]
117 admin 0 SW [kswapd0]
164 admin 0 SW [fsnotify_mark]
172 admin 0 SW< [crypto]
246 admin 0 SW [mtdblock0]
251 admin 0 SW [mtdblock1]
256 admin 0 SW [mtdblock2]
261 admin 0 SW [mtdblock3]
287 admin 0 SW [kworker/0:1]
290 admin 0 SW [mtdblock4]
293 admin 0 SW [kworker/1:1]
295 admin 664 S hotplug2 --persistent --no-coldplug
485 admin 6324 S console
487 admin 1404 S /bin/sh
492 admin 0 SWN [jffs2_gcd_mtd4]
496 admin 1396 S /sbin/syslogd -m 0 -S -O /tmp/syslog.log -s 256 -l 7
498 admin 1400 S /sbin/klogd -c 5
557 admin 0 Z [udhcpc]
558 admin 6332 S /sbin/wanduck
567 admin 1068 S dropbear -p <port> -j -k
590 admin 0 Z [wps_monitor]
591 admin 6332 S wpsaide
593 admin 1532 S nas
594 admin 1080 S /usr/sbin/dhd_monitor
595 admin 21872 D /usr/sbin/acsd
11853 admin 1136 S dropbear -p <port> -j -k
23568 admin 6332 S ntp
23574 admin 0 Z [miniupnpc]
23576 admin 0 Z [udhcpc_lan]
23577 admin 1472 S networkmap
23591 admin 1412 S udhcpc -i br0 -p /var/run/udhcpc_lan.pid -s /tmp/udhcpc_lan -H RT-AC3100-0000
24303 admin 1408 S -sh
25152 admin 0 Z [sh]
25156 admin 0 Z [sh]
25448 admin 1400 R ps
25449 admin 0 SW [kworker/u:0]