ASUS ZenWiFi AX6600 (XT8) hardware fail?

[smaxenb]

Hi all,

I recently got a XT8. When turning it on the led just turns white and keeps white. Nothing else happens, no wireless, no ethernet. No reset, hard-reset is possible and also no factory reset because the ethernet port is down.

I decided to check the serial console of the router. Can anybody tell me if the output says something about a hardware defect? It stops with DIE0 after NAN3.

Here is the serial output:

----
BTRM
V1.3
MEM?
MEMP
CACH
CODE
ZBSS
MAIN
OTP?
OTPP
USBT
NAND
IMG?
IMGL
UHD?
UHDP
RLO?
RLOP
UBI?
UBIP
PASS
----
HELO
CPU0
L1CD
MMUI
PWLD
ZBBS
MAIN
5.0207p1-1.0.38-163.243

SEND
Boot Strap Register:  0x7ffffb42

NVRAM memcfg 0x1427

MCB chksum 0x70a711f8, config 0x1427


MemsysInit hpg0_generic 3.3.1.0 20180919

DDR3

8521FC70 80180000 801A0000 00000000 00000000 00605945

MCB rev=0x00000501 Ref ID=0x05945 Sub Bld=0x006

Dram Timing 11-11-11


start of memsys_begin


mc_cfg_init(): Initialize the default values on mc_cfg

init_memc_dram_profile(): Initializing MEMC DRAM profile

---------------------------------------------------------------

MEMC DRAM profile (memc_dram_profile_struct) values:

  dram_type    = DDR3

====================================================

PART values:

  part_speed_grade    = 1600 CL11

  part_size_Mbits     = 4096 (DRAM size in MegaBits)

  part_row_bits       = 15 (number of row bits)

  part_col_bits       = 10 (number of column bits)

  part_ba_bits        = 3 (number of bank bits)

  part_width_bits     = 16 (DRAM width in bits)

NUMER OF PARTS:

  part_num            = 1 (Number of parts)

TOTAL values:

  total_size_Mbits    = 4096 (DRAM size in MegaBits)

  total_cs_bits       = 0 (number of cs bits, for dual_rank mode)

  total_width_bits    = 16 (DRAM width in bits)

  total_burst_bytes   = 16 (Number of bytes per DRAM access)

  total_max_byte_addr = 0x1fffffff (Maximum/last DRAM byte address)

                        (Number of bits in total_max_byte_addr is 29)

                        (i.e. total_max_byte_addr goes from bit 0 to bit 28)

  ddr_2T_mode         = 0

  ddr_hdp_mode        = 0

  large_page          = 1

  ddr_dual_rank       = 0

  cs_mode             = 0

MEMC timing (memc_dram_timing_cfg_struct) values:

====================================================

  MC_CHN_TIM_TIM1_0 register fields:

    tCwl   = 8

    tRP    = 11

    tCL    = 11

    tRCD   = 11

  MC_CHN_TIM_TIM1_1 register fields:

    tCCD_L = 4

    tCCD   = 4

    tRRD_L = 6

    tRRD   = 6

  MC_CHN_TIM_TIM1_2 register fields:

    tFAW   = 32

    tRTP   = 6

    tRCr   = 39

  MC_CHN_TIM_TIM1_3 register fields:

    tWTR_L = 6

    tWTR   = 6

    tWR_L  = 12

    tWR    = 12

  MC_CHN_TIM_TIM2 register fields:

    tR2R   = 0

    tR2W   = 2

    tW2R   = 2

    tW2W   = 0

    tAL    = 0

    tRFC   = 208

====================================================

%1 SSC enabled



Poll PHY Status register


PHY Status= 1


Disable Auto-Refresh


[0x80180200] = 0x00000305


End of memsys_begin

====================================================
Some lines removed
====================================================

[0x80180004] = 0x8110071f


[0x80180010] = 0x00000009


end of memsys_end


DDR test done successfully


FPS0
----
PAR1
NONE
NAN9
----
PAR2
NONE
NAN9
----
TRY1
NAN3
TRY1
NAN3
DIE0

I found one link in the internet (https://forum.openwrt.org/t/ecc-errors-on-r8000p/135423) with similar output and it resumes with:

---- TRY1 NAN3 JFS2 RFS2 JFFS JFS2 NAN5 R8000P Platform Boot Code V1.0.8

Cheers,
maxe

 

[tgl]

I recently got a XT8. When turning it on the led just turns white and keeps white. Nothing else happens, no wireless, no ethernet.

That's not good. The normal boot-up process includes the LED turning green or blue shortly after power-on. If you aren't able to get out of this by hard-resetting the unit, then it's busted, possibly beyond repair. You might be able to use ASUS' firmware restoration tool to re-flash the firmware, but I'm not holding out huge hope for that.

No reset, hard-reset is possible and also no factory reset because the ethernet port is down.

I don't know what resources you've been consulting, but the ethernet port has nothing to do with a hard reset of an XT8. The method I usually use is per ASUS' FAQ:

1. Turn the power off.
2. Press and hold the WPS button (white button on bottom of router) and turn the router on.
3. Power light is on (keep holding the WPS button).
4. Continue to press and hold the WPS button.
You see the power LED light on(white) -> power LED light turn off -> power
LED light flashing green color -> power LED light turn off and then you
can release the WPS button. (Only takes ~10 seconds)
5. Reboot your router by manually cycling the power button.
Wait for LED to go blue.

Try that first, then see if firmware restoration is possible, and otherwise ... can you return it?

 

[sfx2000]

I recently got a XT8. When turning it on the led just turns white and keeps white. Nothing else happens, no wireless, no ethernet. No reset, hard-reset is possible and also no factory reset because the ethernet port is down.

If it is from a store, take it back for a return/rma

Otherwise, contact Asus customer care for warranty service

 

[smaxenb]

I bought a used one and I think that the previous owner flashed a wrong firmware on the device. Thanks @tgl but as it stucks at DIE0 the recovery partition seems to be destroyed and no more recovery is possible.

Also the warranty already expired :/