If you had damaged uboot, then you won't get anything out of the router.
As you receive data, it seems that Rx and TX are correctly connected, so maybe it's a baudrate problem.
I think it was 115.200 for your router. Verify that.
But, if you flashed the sysupgrade, then your problem is only a corrupted or old rootfs_data.
Boot in failsafe mode (press a router button when you see the led blinking, then it should blink faster).
Set your computer's IP to 192.168.1.100, and telnet 192.168.1.1.
Issue the following commands:
mount_root
mtd -r erase rootfs_data
After the reboot your router will be as new, (all settings and old data cleaned)
(Last edited by dabyd64 on 17 Mar 2013, 19:50)