[Hardware Hacking General] gorzelak:
Progress :)

I have a small progress. The device somehow started to respond on USB port with VID=2207 and PID=310B, so I quickly found and install proper drivers (rockusb.inf).

However:

1) when I try to flash the device with (NEOTV CROM Flash Tool 1.37) I get the following error:

Test device failed

at the same time on the serial console:

2) when I try to flash the device with (Rockchip Batch Tool v1.7) I get the following error:

19:15:47 928	Rockchip Batch Tool v1.7.1.1 start run
19:15:57 111	**********Restore Start Total<1>**********
19:15:57 113	<Layer 6-2> Download Boot Start
19:15:59 662	<Layer 6-2> Download Boot Success
19:15:59 663	<Layer 6-2> Wait For Maskrom Start
19:16:00 113	<Layer 6-2> Wait For Maskrom Success
19:16:00 114	<Layer 6-2> Test Device Start
19:16:00 116	<Layer 6-2> Test Device Success
19:16:00 118	<Layer 6-2> Check Chip Start
19:16:00 120	<Layer 6-2> Check Chip Success
19:16:00 122	<Layer 6-2> Get FlashInfo Start
19:16:00 123	<LAYER 6-2> INFO:FlashInfo: 0 0 0 0 0 4 10 0 32 0 0
19:16:00 124	<Layer 6-2> Get FlashInfo Success
19:16:00 128	<Layer 6-2> Prepare IDB Start
19:16:00 129	<LAYER 6-2> ERROR:PrepareIDB-->No Found 1st Flash CS
19:16:00 131	<Layer 6-2> Prepare IDB Fail
19:16:00 133	**********Restore Done Success<0> Fail<1> Time<3027>ms**********

at the same time on the serial console:

In
DDR3
300MHz
Bus Width=32 Col=10 Bank=8 Row=16 CS=1 Die Bus-Width=8 Size=2048MB
Memory OK
OUT
serial_init
UsbBoot
StorageInit
AccessTime = 50 ns , CycleTiming = 7 ns FMWAIT @0x1082

No.1 FLASH INFO:ff ff ff ff ff ff

No.2 FLASH INFO:ff ff ff ff ff ff

No.3 FLASH INFO:ff ff ff ff ff ff

No.4 FLASH INFO:ff ff ff ff ff ff

SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
ERROR:Card Identify Failed 20

SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
ERROR:Card Identify Failed 20

SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=8 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=5 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=55 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
SDC_BusRequest: CMD=1 SDC_RESP_TIMEOUT 1907
ERROR:Card Identify Failed 20

Spi_ChipId = ffffff
UsbHook

Does it mean that my flash memory got broken??