New RT-AC86U behaving badly - Is it faulty?

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Venturis

New Around Here
I recently purchased an ASUS RT-AC86U (AC2900) and after intial setup it seemed to be working fine for a few days before encountering some very strange behaviour.

It started with completely losing the previously configured DHCP reservations and ended with the router spontaneously resetting itself to factory defaults. Only knew this had happened when I couldn't get any IP addresses for the client devices and found the wifi SSIDs had reverted back to factory default names.

I've tried now factory reset and reinstalled both official and Merlin firmware around 4 times but the last time I noticed that during power on that the indicator lights on router were behaving differently to what I'd expect.

At power on, after a short while, the Power, 2.4Ghz, 5.0Ghz, WAN and local ethernet LEDs light up solidly. A few seconds later the POWER LED flashes OFF/ON three times then remains ON. Immediately after, the 2.4GHz LED light flashes OFF/ON at about 1 second intervals for about the next 3 minutes before finally staying ON.

I can't find any documentation to confirm if the LED flashing routine that I'm seeing on power on is normal. Not something I've seen before on either my RT-AC68U's although appreciate this is a different router entirely.

When I checked the Syslog, I found a couple of unusual entries but nothing specifically that appears during the period when the 2.4Ghz LED starts flashing.

The first message is a reference to MTD10 which appears is mounted and unmounted several items during the boot process.

Code:
May  5 05:05:19 kernel: ubi1: attaching mtd10
May  5 05:05:19 kernel: ubi1: scanning is finished
May  5 05:05:19 kernel: ubi1: attached mtd10 (name "misc1", size 8 MiB)
May  5 05:05:19 kernel: ubi1: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
May  5 05:05:19 kernel: ubi1: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
May  5 05:05:19 kernel: ubi1: VID header offset: 2048 (aligned 2048), data offset: 4096
May  5 05:05:19 kernel: ubi1: good PEBs: 64, bad PEBs: 0, corrupted PEBs: 0
May  5 05:05:19 kernel: ubi1: user volume: 1, internal volumes: 1, max. volumes count: 128
May  5 05:05:19 kernel: ubi1: max/mean erase counter: 8/3, WL threshold: 4096, image sequence number: 661685855
May  5 05:05:19 kernel: ubi1: available PEBs: 0, total reserved PEBs: 64, PEBs reserved for bad PEB handling: 4
May  5 05:05:19 kernel: ubi1: background thread "ubi_bgt1d" started, PID 197
May  5 05:05:19 kernel: ubi1: detaching mtd10
May  5 05:05:19 kernel: ubi1: mtd10 is detached
Secondly a message about BCM963xx core 2 having failed.

Code:
May  5 05:05:19 kernel: PCIe HCD (impl1)^M
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [0] Rev [ 3. 4]^M
May  5 05:05:19 kernel: pci 0000:00:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel: pci 0000:01:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [1] Rev [ 3. 4]^M
May  5 05:05:19 kernel: pci 0001:00:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel: pci 0001:01:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [2] Rev [ 3. 4]^M
May  5 05:05:19 kernel:   bcm963xx-pcie: failed to bring up core [2] link^M
Do either of these messages indicate a faulty router or can someone advise if the LED flashing sequences that occur during startup are normal?

Cheers.
 

OzarkEdge

Part of the Furniture
I recently purchased an ASUS RT-AC86U (AC2900) and after intial setup it seemed to be working fine for a few days before encountering some very strange behaviour.

It started with completely losing the previously configured DHCP reservations and ended with the router spontaneously resetting itself to factory defaults. Only knew this had happened when I couldn't get any IP addresses for the client devices and found the wifi SSIDs had reverted back to factory default names.

I've tried now factory reset and reinstalled both official and Merlin firmware around 4 times but the last time I noticed that during power on that the indicator lights on router were behaving differently to what I'd expect.

At power on, after a short while, the Power, 2.4Ghz, 5.0Ghz, WAN and local ethernet LEDs light up solidly. A few seconds later the POWER LED flashes OFF/ON three times then remains ON. Immediately after, the 2.4GHz LED light flashes OFF/ON at about 1 second intervals for about the next 3 minutes before finally staying ON.

I can't find any documentation to confirm if the LED flashing routine that I'm seeing on power on is normal. Not something I've seen before on either my RT-AC68U's although appreciate this is a different router entirely.

When I checked the Syslog, I found a couple of unusual entries but nothing specifically that appears during the period when the 2.4Ghz LED starts flashing.

The first message is a reference to MTD10 which appears is mounted and unmounted several items during the boot process.

Code:
May  5 05:05:19 kernel: ubi1: attaching mtd10
May  5 05:05:19 kernel: ubi1: scanning is finished
May  5 05:05:19 kernel: ubi1: attached mtd10 (name "misc1", size 8 MiB)
May  5 05:05:19 kernel: ubi1: PEB size: 131072 bytes (128 KiB), LEB size: 126976 bytes
May  5 05:05:19 kernel: ubi1: min./max. I/O unit sizes: 2048/2048, sub-page size 2048
May  5 05:05:19 kernel: ubi1: VID header offset: 2048 (aligned 2048), data offset: 4096
May  5 05:05:19 kernel: ubi1: good PEBs: 64, bad PEBs: 0, corrupted PEBs: 0
May  5 05:05:19 kernel: ubi1: user volume: 1, internal volumes: 1, max. volumes count: 128
May  5 05:05:19 kernel: ubi1: max/mean erase counter: 8/3, WL threshold: 4096, image sequence number: 661685855
May  5 05:05:19 kernel: ubi1: available PEBs: 0, total reserved PEBs: 64, PEBs reserved for bad PEB handling: 4
May  5 05:05:19 kernel: ubi1: background thread "ubi_bgt1d" started, PID 197
May  5 05:05:19 kernel: ubi1: detaching mtd10
May  5 05:05:19 kernel: ubi1: mtd10 is detached
Secondly a message about BCM963xx core 2 having failed.

Code:
May  5 05:05:19 kernel: PCIe HCD (impl1)^M
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [0] Rev [ 3. 4]^M
May  5 05:05:19 kernel: pci 0000:00:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel: pci 0000:01:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [1] Rev [ 3. 4]^M
May  5 05:05:19 kernel: pci 0001:00:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel: pci 0001:01:00.0: of_irq_parse_pci() failed with rc=-22
May  5 05:05:19 kernel:   bcm963xx-pcie: found core [2] Rev [ 3. 4]^M
May  5 05:05:19 kernel:   bcm963xx-pcie: failed to bring up core [2] link^M
Do either of these messages indicate a faulty router or can someone advise if the LED flashing sequences that occur during startup are normal?

Cheers.
Looks dead on arrival. The log entries look like failed hardware subsystems. Could try a hard reset and flash with latest stock firmware and reset again a couple times.

OE
 

Venturis

New Around Here
I'm inclined to agree but the router does appear to work properly once it fully powers up. Its the fact that I've had to go through the whole manual setup 4 times now that I'm reluctant to try again unless I can get some assurance that I'm not wasting my time.

I've tired several hard resets between firmware updates. The hard reset procedure of holding down the WPS button at power on drops the router immediately into the CFE recovery environment and from there I've tried loading the latest ASUS official firmware hoping that whatever the problem might be corrected. And also factory default the unit using the pushbutton at the rear just for good measure.

Are you able to tell me if your current AC86U routers go through the same flashing light sequence that I described in my first post? Particularly if the POWER LED flashes OFF/ON three times after which the 2.4GHZ LED Flashes ON/OFF for about 2-3 minutes at 1 second intervals before finally staying ON?
 

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