Jtag help needed; xbox not booting

[darylzero]

Hi Guys,
i had posted abt this earlier but im not able to find it so, im writing it again, i relly need help here.
first of all iam a noob at this i was totally relying on tutorials to jtag the xbox 360,
secondly der were nobody around here who does the jtag,
and nandx was not readily available for purchase. so i did the jtag myself and now im stuck in the situation where i think i have bricked my xbox

the problem is, i bought a xenon xbox 360 with blade dash with verison i think 6683. last week i started the soldering followed obsessedwithgta4's tutorial on youtube(using LPT and jtag tool).
read the nand seven times, out of which except first two and last one remaning were identical and all were having a common badblock at 0de and location 3ff.
i read online that it is ok to have 1or2 badblocks so i continued with writing xellous, then i connected 360 to my monitor got the cpu key,
and created the freeboot 13599 using jtag tool and wrote it. while writing i got an error stating error: 250 programming block de.
once it was completed unplugged all cables left it open for some 2-3 minutes then connected it back and started it. it started with the new welcome screen logo and den showed e71 error.
so i tried to write back my original nand, as a result it started showing no display on monitor and 3 red lights on the console.
yesterday i desoldered all the wires and made a new connection from scratch this time i used diode way,
i wrote xellous once again it didnt work(ie it didnt boot to blue screen). then i remapped the badblocks on nand and created new freeboot using jtag tool and wrote again this time i got a new error stating error 202 programming block from some 212 to 289(the numbers may not be accurate). after completion i disconnected it for abt an hour and now when i switch it on it is not even starting i mean no green or redlights. i have tried all methods i learned so far with no success. so now all i want to know is,
have i bricked my xbox 360 permanently or can it be fixed if it can be fixed kindly someone walk me through this.

Thank you.

 

[mosely]

With bad blocks, they are only ok if they are constantly in the same place. That means that with multiple nand reads, they constantly occur in the same blocks. If that's the issue then its normal. Though, you might want to just rewrite your original nand to the xbox. Though makes sure that you read your nand multiple times and compare the nand reads to each other. If they check out, try to write it back to the console with no JTAG wires attached. Also make sure you dont have any bridges on the board. Lastly, if the nands are different then you'll need to use a donor nand. Pop one nand read into 360 Flash Tool and use your CPU Key to decrypt it. Then extract your KV. After that you can inject your KV into a donor nand for your board and it should work.

 

[darylzero]

Thanks for the reply, i did as u told first wrote the nand it came back to its 3 redring state with no display, then i wrote the kv injected freeboot following this tutorial
http://www.xpgamesaves.com/topic/16412-tutorial-create-a-nand-with-just-a-cpu-key-with-a-donar-nand/
with no help, once i wrote the freeboot it again stopped working(its not turning on)
also i have uploaded the image showing the programming block error during both nand dump and freeboot
http://imageshack.us/g/35/nandwrite.png/

 

[darylzero]

Thanks for the reply, i did as u told first wrote the nand it came back to its 3 redring state with no display, then i wrote the kv injected freeboot following this tutorial
http://www.xpgamesaves.com/topic/16412-tutorial-create-a-nand-with-just-a-cpu-key-with-a-donar-nand/
with no help, once i wrote the freeboot it again stopped working(its not turning on)
also i have uploaded the image showing the programming block error during both nand dump and freeboot
http://imageshack.us/g/35/nandwrite.png/