Posted: Tue Feb 26, 2013 23:38 Post subject: JTAG recovery of a WNDR3700v3
Hi there. I received a WNDR3700v3 from a friend today that was entirely bricked. He said he tried some DD-WRT build from an unofficial dd-wrt site and now I am unable to even ping the router even with a static ip. What are the jtag recovery options for this router as there is no helpful information I can locate using google. I have taken a picture of the board so you guys can have a better look. I have flashed a Microsoft MN-700 (which requires soldering) and have some experience soldering on other devices so please advise.
EDIT: I uploaded the pic to imgshack instead of posting it as an attachment because its too big:
I have checked the site and there are details for a 14 pin header but the wndr3700v3 only has a 12 pin header on J14. This is why I attached a picture. Thank you so much for your attempt at helping me.
Any other suggestions?
Also: Sorry for the late reply, I didnt have "Notify me when a reply is posted" checked. I will reply more promptly from now on.
I have checked the site and there are details for a 14 pin header but the wndr3700v3 only has a 12 pin header on J14. This is why I attached a picture.
You can see that I used the JP1 where pin#6 is on top (closest to JP1 id). I used the pin #2, #5 and #6. It was a lot easier to solder them from the back. To make it more easy, I used a 1/32 drill bit with my dremel and drilled the pins. It worked like a charm.
Note that this jtag connection only help to put your wndr3700v3 in recovery mode. You will still need a ethernet cable to flash your router. _________________ dd-wrt.v24-22118_NEWD-2_K3.x_mega-nv64k.bin
You can see that I used the JP1 where pin#6 is on top (closest to JP1 id). I used the pin #2, #5 and #6. It was a lot easier to solder them from the back. To make it more easy, I used a 1/32 drill bit with my dremel and drilled the pins. It worked like a charm.
Note that this jtag connection only help to put your wndr3700v3 in recovery mode. You will still need a ethernet cable to flash your router.
That's not a jtag connection. That is a serial connection. Jp1 is the serial pinout. _________________ I am far from a guru, I'm barely a novice.
You can see that I used the JP1 where pin#6 is on top (closest to JP1 id). I used the pin #2, #5 and #6. It was a lot easier to solder them from the back. To make it more easy, I used a 1/32 drill bit with my dremel and drilled the pins. It worked like a charm.
Note that this jtag connection only help to put your wndr3700v3 in recovery mode. You will still need a ethernet cable to flash your router.
That's not a jtag connection. That is a serial connection. Jp1 is the serial pinout.
So on my board what is the pinout of JP1 given it has 4 pads.
EDIT: I found out the top pin is 3.3v (so that's one down)
Probably the serial port. Try it. One of the will be vcc, the other ground, that will leave you with tx and rx. _________________ I am far from a guru, I'm barely a novice.
Probably the serial port. Try it. One of the will be vcc, the other ground, that will leave you with tx and rx.
I'll do that and post back. Thx.
That did the trick. Thx.
For the record, The top pin (call it one) is VCC and not connected to the ttl, pin 2 is GND and attached to the ttl, pins 3 and 4 are TX and RX although I forgot to record which is which before closing up.
