Asus XD4 fails at the booting process.

[McKey]

It is the router module (XD4R). It stucks basically immediately and has a solid white light. I hooked it up to UART, it fails at the beginning of the boot sequence, where it is checking its hardware (see below).
Can someone guess from this what could fail on this little bad boy?
It has three bigger coils, all have the correct voltages -compared to the node module (XD4N). The cpu has almost the same resistance as on the node, i guess the differences are coming from the plus chip that is connected to the same coil on the router module. Im suspecting the RAM, i already tried to reflow it, gives the same on the UART.

----
BTRM
V1.3
MEM?
MEMP
CACH
CODE
ZBSS
MAIN
OTP?
OTPP
USBT
NAND
IMG?
IMGL
UHD?
UHDP
RLO?
RLOP
UBI?
UBIF
IMG?
IMGL
UHD?
UHDP
RLO?
RLOP
UBI?
UBIF
IMG?
FAIL
----

[McKey]

In the mean time while im waiting for some tips, i post some pics about the board. May it helps someone. I think it will be the first about it, at least google wont show up anything useful.

[McKey]

It was a faulty flash memory. I could save it by buying 10pcs of this MXIC and one of them contained 0 bad blocks, so i could copy the original flash content to it. Now the new chip contains the old chips bad block count and i think it will add the new bad blocks to that count in the future. With the other flash chips with 1 or more bad blocks on it it is always failed after random amount of time (once it is took more than 1 month). I guess that if there is an existing bad block from the factory, the chip/os cant handle that, tries to read/write it, and fails. Not worth to save them if you have to rely on this bad block silicon lottery...