After firmware upgrade my Tp-Link Archer C7 v2.0 RU doesn't start.

1. I'm try tftp recovery but router doesn't send any packets.

2. Then I try serial console via usb-ttl, but it's show only:

U-Boot 1.1.4 (Jun 29 2015 - 20:49:26)

ap135 - Scorpion 1.0DRAM:
sri
Scorpion 1.0
ath_ddr_initial_config(178): (32bit) ddr2 init
tap = 0x00000003
Tap (low, high) = (0x3, 0x1c)
Tap values = (0xf, 0xf, 0xf, 0xf)
128 MB

3. I try use JTAG via rasberry Pi and reflash uboot and firmware.
But Archer doesn't boot and serial output still show

U-Boot 1.1.4 (Jun 29 2015 - 20:49:26)

ap135 - Scorpion 1.0DRAM:
sri
Scorpion 1.0
ath_ddr_initial_config(178): (32bit) ddr2 init
tap = 0x00000003
Tap (low, high) = (0x3, 0x1c)
Tap values = (0xf, 0xf, 0xf, 0xf)
128 MB

Can anybody help me?

(Last edited by unit on 29 Jul 2016, 14:40)