WNDR3700v4 bricked router - need help !!!

Hi,

I have a WNDR3700v4 bricked router and when I connect it using a serial-to-ttl I get the following on putty console (the lines are on me):
--------------------------------------
sri
Wasp 1.2
Wasp (32bit) ddr2 init
setting for 40
fw1: Nand Init
leave FW1
f/w 0 execution complete
hdr: [0xa0100000 : 0xa0100000 : 0x11000 : 0x45d0eb56]
nand_load_fw: read 34 pages
nand_load_fw: 0x70000 0x800 0xa01007f0
nand_load_fw: 0x80000 0x800 0xa0100ff0
nand_load_fw: 0x90000 0x800 0xa01017f0
nand_load_fw: 0xa0000 0x800 0xa0101ff0
nand_load_fw: 0xb0000 0x800 0xa01027f0
nand_load_fw: 0xc0000 0x800 0xa0102ff0
nand_load_fw: 0xd0000 0x800 0xa01037f0
nand_load_fw: 0xe0000 0x800 0xa0103ff0
nand_load_fw: 0xf0000 0x800 0xa01047f0
nand_load_fw: 0x100000 0x800 0xa0104ff0
nand_load_fw: 0x110000 0x800 0xa01057f0
nand_load_fw: 0x120000 0x800 0xa0105ff0
nand_load_fw: 0x130000 0x800 0xa01067f0
nand_load_fw: 0x140000 0x800 0xa0106ff0
nand_load_fw: 0x150000 0x800 0xa01077f0
nand_load_fw: 0x160000 0x800 0xa0107ff0
nand_load_fw: 0x170000 0x800 0xa01087f0
nand_load_fw: 0x180000 0x800 0xa0108ff0
nand_load_fw: 0x190000 0x800 0xa01097f0
nand_load_fw: 0x1a0000 0x800 0xa0109ff0
nand_load_fw: 0x1b0000 0x800 0xa010a7f0
nand_load_fw: 0x1c0000 0x800 0xa010aff0
nand_load_fw: 0x1d0000 0x800 0xa010b7f0
nand_load_fw: 0x1e0000 0x800 0xa010bff0
nand_load_fw: 0x1f0000 0x800 0xa010c7f0
nand_load_fw: 0x200000 0x800 0xa010cff0
nand_load_fw: 0x210000 0x800 0xa010d7f0
nand_load_fw: 0x220000 0x800 0xa010dff0
nand_load_fw: 0x230000 0x800 0xa010e7f0
nand_load_fw: 0x240000 0x800 0xa010eff0
nand_load_fw: 0x250000 0x800 0xa010f7f0
nand_load_fw: 0x260000 0x800 0xa010fff0
nand_load_fw: 0x270000 0x800 0xa01107f0
Checksum mismatch. 0x45d0eb56 != 0x45d0e956
find_hif: bootstrap = 0xaf055a
WASP BootROM Ver. 1.1
Nand Flash init
ONFI: Control setting = 0xb44
hdr: [0xbd004000 : 0xbd004000 : 0x3000 : 0xc200e86c]
nand_load_fw: read 6 pages
nand_load_fw: 0x10000 0x800 0xbd0047f0
nand_load_fw: 0x20000 0x800 0xbd004ff0
nand_load_fw: 0x30000 0x800 0xbd0057f0
nand_load_fw: 0x40000 0x800 0xbd005ff0
nand_load_fw: 0x50000 0x800 0xbd0067f0
f/w 0 read complete, jumping to 0xbd004000
initialize PLL & DDR

sri
Wasp 1.2
Wasp (32bit) ddr2 init
setting for 40
fw1: Nand Init
leave FW1
f/w 0 execution complete
hdr: [0xa0100000 : 0xa0100000 : 0x11000 : 0x45d0eb56]
nand_load_fw: read 34 pages
nand_load_fw: 0x70000 0x800 0xa01007f0
nand_load_fw: 0x80000 0x800 0xa0100ff0
nand_load_fw: 0x90000 0x800 0xa01017f0
nand_load_fw: 0xa0000 0x800 0xa0101ff0
nand_load_fw: 0xb0000 0x800 0xa01027f0
nand_load_fw: 0xc0000 0x800 0xa0102ff0
nand_load_fw: 0xd0000 0x800 0xa01037f0
nand_load_fw: 0xe0000 0x800 0xa0103ff0
nand_load_fw: 0xf0000 0x800 0xa01047f0
nand_load_fw: 0x100000 0x800 0xa0104ff0
nand_load_fw: 0x110000 0x800 0xa01057f0
nand_load_fw: 0x120000 0x800 0xa0105ff0
nand_load_fw: 0x130000 0x800 0xa01067f0
nand_load_fw: 0x140000 0x800 0xa0106ff0
nand_load_fw: 0x150000 0x800 0xa01077f0
nand_load_fw: 0x160000 0x800 0xa0107ff0
nand_load_fw: 0x170000 0x800 0xa01087f0
nand_load_fw: 0x180000 0x800 0xa0108ff0
nand_load_fw: 0x190000 0x800 0xa01097f0
nand_load_fw: 0x1a0000 0x800 0xa0109ff0
nand_load_fw: 0x1b0000 0x800 0xa010a7f0
nand_load_fw: 0x1c0000 0x800 0xa010aff0
nand_load_fw: 0x1d0000 0x800 0xa010b7f0
nand_load_fw: 0x1e0000 0x800 0xa010bff0
nand_load_fw: 0x1f0000 0x800 0xa010c7f0
nand_load_fw: 0x200000 0x800 0xa010cff0
nand_load_fw: 0x210000 0x800 0xa010d7f0
nand_load_fw: 0x220000 0x800 0xa010dff0
nand_load_fw: 0x230000 0x800 0xa010e7f0
nand_load_fw: 0x240000 0x800 0xa010eff0
nand_load_fw: 0x250000 0x800 0xa010f7f0
nand_load_fw: 0x260000 0x800 0xa010fff0
nand_load_fw: 0x270000 0x800 0xa01107f0
Checksum mismatch. 0x45d0eb56 != 0x45d0e956
find_hif: bootstrap = 0xaf055a
WASP BootROM Ver. 1.1
Nand Flash init
ONFI: Control setting = 0xb44
hdr: [0xbd004000 : 0xbd004000 : 0x3000 : 0xc200e86c]
nand_load_fw: read 6 pages
nand_load_fw: 0x10000 0x800 0xbd0047f0
nand_load_fw: 0x20000 0x800 0xbd004ff0
nand_load_fw: 0x30000 0x800 0xbd0057f0
nand_load_fw: 0x40000 0x800 0xbd005ff0
nand_load_fw: 0x50000 0x800 0xbd0067f0
f/w 0 read complete, jumping to 0xbd004000
initialize PLL & DDR

sri
Wasp 1.2
Wasp (32bit) ddr2 init
setting for 40
fw1: Nand Init
leave FW1
f/w 0 execution complete
hdr: [0xa0100000 : 0xa0100000 : 0x11000 : 0x45d0eb56]
nand_load_fw: read 34 pages
nand_load_fw: 0x70000 0x800 0xa01007f0
nand_load_fw: 0x80000 0x800 0xa0100ff0
nand_load_fw: 0x90000 0x800 0xa01017f0
nand_load_fw: 0xa0000 0x800 0xa0101ff0
nand_load_fw: 0xb0000 0x800 0xa01027f0
nand_load_fw: 0xc0000 0x800 0xa0102ff0
nand_load_fw: 0xd0000 0x800 0xa01037f0
nand_load_fw: 0xe0000 0x800 0xa0103ff0
nand_load_fw: 0xf0000 0x800 0xa01047f0
nand_load_fw: 0x100000 0x800 0xa0104ff0
nand_load_fw: 0x110000 0x800 0xa01057f0
nand_load_fw: 0x120000 0x800 0xa0105ff0
nand_load_fw: 0x130000 0x800 0xa01067f0
nand_load_fw: 0x140000 0x800 0xa0106ff0
nand_load_fw: 0x150000 0x800 0xa01077f0
nand_load_fw: 0x160000 0x800 0xa0107ff0
nand_load_fw: 0x170000 0x800 0xa01087f0
nand_load_fw: 0x180000 0x800 0xa0108ff0
nand_load_fw: 0x190000 0x800 0xa01097f0
nand_load_fw: 0x1a0000 0x800 0xa0109ff0
nand_load_fw: 0x1b0000 0x800 0xa010a7f0
nand_load_fw: 0x1c0000 0x800 0xa010aff0
nand_load_fw: 0x1d0000 0x800 0xa010b7f0
nand_load_fw: 0x1e0000 0x800 0xa010bff0
nand_load_fw: 0x1f0000 0x800 0xa010c7f0
nand_load_fw: 0x200000 0x800 0xa010cff0
nand_load_fw: 0x210000 0x800 0xa010d7f0
nand_load_fw: 0x220000 0x800 0xa010dff0
nand_load_fw: 0x230000 0x800 0xa010e7f0
nand_load_fw: 0x240000 0x800 0xa010eff0
nand_load_fw: 0x250000 0x800 0xa010f7f0
nand_load_fw: 0x260000 0x800 0xa010fff0
nand_load_fw: 0x270000 0x800 0xa01107f0
Checksum mismatch. 0x45d0eb56 != 0x45d0e956
find_hif: bootstrap = 0xaf055a
WASP BootROM Ver. 1.1
Nand Flash init
----------------------------------------

Do you have an idea how I can fix it so that I can upload original firmware?

I thank you in advance.

Best regards.