Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Sun Jun 07, 2009 20:32 Post subject:
Your wiring appears to be correct. Use an ohm meter from each pin to ground, and from pin to pin. Make sure you have no shorts. You will get a reading, but nothing should be zero ohms (except the ground pads..). Edge connectors are a bit challenging.
If that all checks out, force the flash chip with the /fc:xx. See where that goes for you.
I've run into this.. Never been able to figure it out but it happens from time to time. /fc:xx usually takes care of it (I assume no pin shorting was done).
You may want to dink around with the switches.. I am working on a G2 and unless I use a specific switch(s), the flash is not recognized. I need to use (on a G2) /noreset /bypass /nocwd..
Butt forcing it with /fc:xx should take care of it. _________________ [Moderator Deleted]
Your wiring appears to be correct. Use an ohm meter from each pin to ground, and from pin to pin. Make sure you have no shorts. You will get a reading, but nothing should be zero ohms (except the ground pads..). Edge connectors are a bit challenging.
If that all checks out, force the flash chip with the /fc:xx. See where that goes for you.
I've run into this.. Never been able to figure it out but it happens from time to time. /fc:xx usually takes care of it (I assume no pin shorting was done).
You may want to dink around with the switches.. I am working on a G2 and unless I use a specific switch(s), the flash is not recognized. I need to use (on a G2) /noreset /bypass /nocwd..
Butt forcing it with /fc:xx should take care of it.
Thank you so much for your quick reply. I did not do the pin short technique and I just got done double checking the resistances from pin to pin and pin to ground. Everything checks out ok (bottom pins grounded, top not). I will try the FC command but I need to research it first. If you know off hand the command to input I would appreciate that, if not I will let you know how it goes after I figure it out.
My apologies, I should have been more clear. My chip is not in the list. I assume the Hynix chip on top is the volatile memory and the Samsung on the bottom is the flash memory (K8P3215UQB).
Here is a picture of the Hynix chip.
Here is a picture of the Samsung on the bottom.
Joined: 26 Jan 2008 Posts: 13049 Location: Behind The Reset Button
Posted: Sun Jun 07, 2009 21:36 Post subject:
Yes.. The samsung appears to be the flash chip. You can tell by the dots.. Looking at the supported chips in the newest tjag utility, k8b isn't in the list. k8d is.
Send Tornado a pm & link this thread.. You may be a pioneer! Butt .. There may be an fc you can use that would be compatable.. I however, have no idea..
That's why Tornado makes the "big bucks" _________________ [Moderator Deleted]
Posted: Tue Aug 11, 2009 2:54 Post subject: debricking WRT310N with Jtag cable!
hello, I already soldered 12 pins in the wrt310n board router as I`ve been told, when I run tjag214.exe -probeonly it seems like recognize a broadcom BCM4785, but my router has a broadcom BCM4705 which is not in the list of supported chips by the jtag214.exe.. but then it seems like stop working the jtag.exe (hang up), what can I do? anybody can help me please? I need to debrick my expensive WRT310N which I just updated a wrong firmware from Linksys!
wrt3120n-2.jpg
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this is the backside in order to see how I soldered pins in the back of the router board!
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wrt310n-1.jpg
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this is the front side,anyone knows which one is the chip?
I believe 4705/4785 are identical chips with different names? _________________ SIG:
I'm trying to teach you to fish, not give you a fish. If you just want a fish, wait for a fisherman who hands them out. I'm more of a fishing instructor.
LOM: "If you show that you have not bothered to read the forum announcements or to follow the advices in them then the level of help available for you will drop substantially, also known as Murrkf's law.."
Joined: 04 Jan 2007 Posts: 11564 Location: Wherever the wind blows- North America
Posted: Tue Aug 11, 2009 14:04 Post subject:
BCM4705 is a 4785 chip...they are one in the same....just like the old BCM4702 is the same as 4710. It's just recognition codes of the chip.
I posted pics of how to JTAG also (linked in wiki) I bent my JTAG connector at a right angle (facing down) and cut an access slot in the bottom of the router case.
forcing it with /fc:xx should take care of it.
