Bricked WNR3500L - Only Orange light (and lan)

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OpenMehRouter
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Bricked WNR3500L - Only Orange light (and lan)

Hi,

 

I have a WNR3500L v1 that I tried to flash the latest OpenWRT onto (without looking if it's compatible). The router was promptly bricked. When I turn it on, the orange light turns on, all the LEDs turn on (blue and green) about 4 secs later, and then just the  Orange power light staying on, and a green lan light for whatever is connected.

I have tried TFTPing numerous times in the TFTP window (of about 2 seconds), but it never accepted the request.

Later on, I tried the pin short method about a dozen times, but to no success, as it never accept the TFTP transfer either.

I purchased USB TTL adapter (this: http://www.ebay.ca/itm/New-FT232RL-USB-To-Serial-Adapter-Module-USB-TO-2...) and soldered the 3.3v connection after cutting the 5v trace. Pin 2 (of the router) is connected to the RX pin, and Pin 5 is connected to the TX pin, and Pin 6 is connected to the GND pin of my usb adapter.

Installing the drivers and setting PuTTY to COM3 at 115200 bits with no flow control always leaves me a blank window with no router output. The way how it's set is I have the router off, with the serial pins connected and PuTTY ready. I turn on the router and I see the TX and RX lights of my USB TTL adapter briefly flash. However, putty recieves no input. When I press keys in the terminal window, I can see the TX light flashing green. Trying the 30-30-30 (while holding the reset button) with the serial cable only makes all the lights turn green/blue (on the router) with 1.5 sec delay rather than 4 sec delay. When I release the reset button, I see the USB TTL cable flashes red on the RX side.

Can anybody help me out to revive this router?

 

Many thanks :D

Kong
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Try again with inverted TX/RX

Try again with inverted TX/RX connection to the board.

OpenMehRouter
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I've already tried with the

I've already tried with the TX/RX inverted, but still no output.

Kong
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And your serial settings are:

And your serial settings are:

Speed: 115200
Data Bits: 8
Stop Bits: 1
Parity and Flow: none

OpenMehRouter
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Yes, correct, I used those

Yes, correct, I used those settings on COM3 (which shows up in device manager from the FT232RL chip)

Kong
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Did you start putty with

Did you start putty with admin rights? Other than that you need a oscilloscope to check on the serial communication or try one of the cables we normally use.

OpenMehRouter
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I have UAC disabled, so

I have UAC disabled, so everything is in admin mode. Unfortunatley, I don't have an ocscilloscope, but I checked the that the circuit is complete between the serial header and the USB TTL adapter.

Did I damage the flash chip by trying the pin short method so many times?

 

Thanks for your help.