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[jim79jones]

hi guys and a happy new year,

some days ago i started to do the JTAG on my falcon console.
I read the nand successfully a few times and inserted the necessary stuff into xbr.bin and flashed it to my console.
I booted xell and got my cpu key and my drive key and everything was fine.
I was able to start xexloader but there was a short somewhere cause every time i inserted the power plug my xbox booted without touching it, so i decided to resolder some pins and to remove lpt.

Since that all i'm getting 3 christmas lights when turning on the console. If i remove (some or all of) the jtag wires e79 comes up. I tried a lot of stuff and was even able to boot into the dash once or twice but not constantly (1 out 20 times) so there has to be a problem with my wiring (since it worked i would like to say that i have not mixed up where to solder the right cable).
The db1f1 had no real solder on it i used ft1u2, but since i soldered a few times on it to check for errors it seems broken, so i did the ghetto mod an scraped of a little of the connection path to ft1u2 and soldered the wire to that one. Maybe i broke everything by doing so ?


I checked voltages on the jtag points and if i remove the jtag wire they have the following voltages :

J2D2.1 --> Mass = 2.1V
J2D2.2 --> Mass = 2.1V

J2D2.4 --> Mass = 0.0V
J2D2.7 --> Mass = 2.1V


voltage (with attached jtag wires) look like this :

J2D2.1 --> Mass = 0.41V (1.42 KOhm)
J2D2.2 --> Mass = 2.09V (1.56 KOhm)

J2D2.4 --> Mass = 2.1V (0.6 KOhm)
J2D2.7 --> Mass = 2.1V (0.6 KOhm)
J2D2.4 --> J2D2.7 = 0V


i guess J2D2.1 with connected wire should be 2.1V too ?

I already tried new diodes (i'm using BAT41), new cables, ...

Is there (if J2D2.1 is the problem) a way to see if that point is ok without soldering something to (like reading voltage or something) from ft1u2 or db1f1.

Do i have to have my mainboard inside the cage with all screws connected or is it ok (for quick testing) to test without cage and screws ?

Right now i don't really know what to do except flashing back my orig.bin and keep jtag in my memories, but that would suck :-)

Any help is really appreciated.

Thanks in advance

jim

This post has been edited by jim79jones: Jan 1 2010, 05:29 PM

[jim79jones]

updated to the new xbreboot and checked my flash with Nandcomplete and the flash is ok, but it still gives me the 3x rod.

could anyone please measure the voltages

[rastaman108037]

QUOTE(jim79jones @ Jan 3 2010, 01:37 PM)

updated to the new xbreboot and checked my flash with Nandcomplete and the flash is ok, but it still gives me the 3x rod.

could anyone please measure the voltages

Christmas lights is usually a keyvault problem. Chances are you forgot to write the rawkv ro had a problem with your rawkv file.

[jim79jones]

if it hadn't worked in the first place i would say you are right, but i was able to boot it a few times.
Before extracting rawkv.bin and rawconfig.bin i read the nand six times until i got matching nands. I ran these through degraded, 360 Flash Tool, ... and the looked fine.
i extracted them both from my "good" nand copy and inserted them into the xbr.bin and flashed it.
I verified it using Nand complete (that had to rewrite a chunk) and so i think my "flashing-side" should be ok.
if i remove the jtag wires i'm getting a e79 (that usually occurs when jtag wires are missing or wrong)

But i could be wrong and any help is appreciated

Jim

Ps.. one thing i noticed : extracting rawkv.bin with nandpro (what i did and used for the xbr.bin) results in a diffrent file than extracting it with 360 Flash Tool.

This post has been edited by jim79jones: Jan 4 2010, 11:34 AM

[Downcastnut]

QUOTE(jim79jones @ Jan 4 2010, 11:32 AM)

Ps.. one thing i noticed : extracting rawkv.bin with nandpro (what i did and used for the xbr.bin) results in a diffrent file than extracting it with 360 Flash Tool.

thats because the 360 flash tool dump has ECC so when you write it you need to use +W not -w

am i correct on this assumption?

so thats not the problem.

[dennisv9]

QUOTE(rastaman108037 @ Jan 4 2010, 12:17 AM)

Christmas lights is usually a keyvault problem. Chances are you forgot to write the rawkv ro had a problem with your rawkv file.

shouldn't it then boot into xell? for xell you don't need a valid keyvault and configblock. so if the jtag wiring is correct, you should be able to boot into xell. if you can, then there might be a problem with your keyvault injection. but then you know for sure that the jtag wiring is correct. so either just flash a xell image to test that... and/or xbr apparently also has xell inserted, it can be accessed by using a wired usb controller (back usb port) by powering with the big round button. or with the mediaplayer? button on the remote if you have a ms remote. but if you don't have either, just flash the xell image and see if xell boots

haven't tested this, since i cannot even get xell to boot...

[jim79jones]

my guess is that my xbr flashed nand is okay (i inserted kv and config.bin into xbr falcon 8955 3a, wrote that to the nand and checked it with Nandcomplete and it is the same. Today i even took my orig.bin again, extracted kv and config again, wrote it into xbr and compared it to the file that i used for flashing my box and they were the same. My kv has to be ok cause i was able to boot into xell and xbr a few times)

so i think that there has to be a fault in my connection and thats why i really would appreciate if someone could post their voltages to compare it.
I'm pretty sure that i did not mix up the jtag connections.

[rastaman108037]

QUOTE(jim79jones @ Jan 4 2010, 11:32 AM)

my guess is that my xbr flashed nand is okay (i inserted kv and config.bin into xbr falcon 8955 3a, wrote that to the nand and checked it with Nandcomplete and it is the same. Today i even took my orig.bin again, extracted kv and config again, wrote it into xbr and compared it to the file that i used for flashing my box and they were the same. My kv has to be ok cause i was able to boot into xell and xbr a few times)

so i think that there has to be a fault in my connection and thats why i really would appreciate if someone could post their voltages to compare it.
I'm pretty sure that i did not mix up the jtag connections.

I have a falcon but my understanding of electricity is a bit poor. What should I set the multimeter on? I can check when I get home.

[jim79jones]

it would be great if you could do that. i don't know if its useful for anything but right now i'm pretty lost.

There are the 4 JTAG Points. Now get your multimeter and connect(hold) the black one to the case(=mass) and the red one to one of the jtag points and read what they are saying.

J2D2.1 is the one that goes to DB1F1 or FT1U2
J2D2.2 is the one that goes to RF Unit (yellow wire in the jtag diagram)
J2D2.4 / J2D2.4 are the one that are bridged (blue wires)

my readings are this (when jtag wires are connected) :

J2D2.1 --> Mass = 0.41V (1.42 KOhm)
J2D2.2 --> Mass = 2.09V (1.56 KOhm)

J2D2.4 --> Mass = 2.1V (0.6 KOhm)
J2D2.7 --> Mass = 2.1V (0.6 KOhm)
J2D2.4 --> J2D2.7 = 0V

maybe it helps to see that yours are the same or different

THANKS

jim

This post has been edited by jim79jones: Jan 4 2010, 08:10 PM

[jayboy86]

i had the same problem as you m8. i solved it by doing the following

connect your lpt to your 360, power in but not switched on

totally erase your nand in your 360 (nandpro lpt: -e16 0 400)

flash new a new copy of xbr.bin to your nand, dont inject anything into it yet (nandpro lpt: -w16 xbr.bin)

after the flash has finished, then flash your kv to the nand (nandpro lpt: -w16 rawkv.bin 1 1)

disconnect lpt and boot 360 and it should work, work pefectly for me.

good luck

[jim79jones]

i just flashed back my orig.bin after erasing the nand and my xbox works fine.
If i connect the jtag-wires with the orig.bin flashed i get the same 3x rod as i got when i had installed xbr.
If i remember it correctly i have read that it should boot normally when jtag wires are attached and you don't have xbr on it.

[jim79jones]

bazinga

i read around the forums and saw something about how to measure diodes and stuff like that. I was using bat41 diodes (some mentioned these were working "better" than the others. I used my voltmeter to measure the voltage drop and it was 460 for the bat41 and 750 for the 1N4148. The last days i only switched diodes to test if they were broken and always used the bat41 diodes. Now i used the 1N4148 and i was able to boot "normal xbe" without any signs of a rod.
I'll now flash xell (faster than flashing xbr) to see if it works.

If it does i'll report again...

XELL BOOTS

YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH

finally, after >20h waisted on soldering and resoldering it was a f+%&in diode.

Thanks for all your efforts

i'm a happy guy now ;-)

This post has been edited by jim79jones: Jan 5 2010, 04:56 PM