linksys wrt1900acs v2 boot problem

[Dilyan Lazarov]

Hi,
I have a problem with my linksys wrt1900acs.
My main question is this a hardware problem or software problem?
Is it possible to address?
I have started researching and have tried with "kwboot" under Windows VM -
Ubuntu 20 - Linux but I have a problem with usb serial connection. I have
tried several things but I understand that it isn't possible to start USB
to Serial on a Windows VM.
I will expect your response.
Thank you in advance.

All the best
Dilyan

I see the following Log from U-Boot with PuTTy under Windows 10:
BootROM - 1.73
Booting from NAND flash

General initialization - Version: 1.0.0
Detected Device ID 6820
High speed PHY - Version: 2.0

Init RD NAS topology Serdes Lane 3 is USB3
Serdes Lane 4 is SGMII
board SerDes lanes topology details:
 | Lane #  | Speed |  Type       |
 --------------------------------
 |   0    |  06   |  SATA0      |
 |   1    |  05   |  PCIe0      |
 |   2    |  06   |  SATA1      |
 |   3    |  05   |  USB3 HOST1 |
 |   4    |  05   |  PCIe1      |
 |   5    |  00   |  SGMII2     |
 --------------------------------
:** Link is Gen1, check the EP capability
PCIe, Idx 0: Link upgraded to Gen2 based on client cpabilities
:** Link is Gen1, check the EP capability
PCIe, Idx 1: remains Gen1
High speed PHY - Ended Successfully
DDR3 Training Sequence - Ver TIP-1.26.0
mvSysEnvGetTopologyUpdateInfo: TWSI Read failed
WL Supp: IF 0 busId 1 Failed !
WL Supp: IF 0 failed
ddr3TipDynamicWriteLevelingSupp failure
********   DRAM initialization Failed (res 0x1)   ********
DDR3 run algorithm - FAILED 0x1
DDR3 Training Sequence - FAILED


 **********          DRAM initialization failed!   ********
-- 
Dilyan