Xbox 360 slim (Trinity) XCGPU replace

[miltisus]

Dear all,

The story starts a few months ago when I got from a friend a 360 slim on which he tried to "reflow" the XCGPU.
Not only that he didn't repaired it, but he managed to move a bit the chip while heated, not much, but enough to cause some serious short-circuit underneath it.
First I wanted to reball the chip, but it was completely destroyed (small blisters).
So, I ordered from China a new chip and soldered it into place.

First try. The console tried to start(green light) than immediately red.

Looked for the error code, it is 0033.
I have a lot of experience with electronics, but I must admit that I only repaired a couple of 360s.
So I would need a bit of help. I have no idea where to go next.
The chip is new, and it has no keys or KV.
I've read the NAND, but I have absolutely no idea what would be the next step.

Clearly, I need a new CPU key. How do I write it? where?

Is there anybody who would like to take his time and explain this "NOOB style" to me?

I've searched high and low but didn't find a solution for a new xcgpu.

Thanks!

 

[gavin_darkglide]

If you werent given a CPU key or nand dump, you will need to install RGH hardware, and use xell to get CPU key. After that, you will need to create an RGH image with the KV on the console, and use it as an RGH. The console will never be a retail console again, as KV's are locked to CPU, and they have to be a matching pair. Any good CPU reseller for the 360 also send the nand chip, so you can replace both, and not have this problem. If you ask me, they should email you a working nand dump, instead of sending the chip, but that is how they do it. And that is assuming you recieved a retail CPU, and not a devkit CPU.

 

[miltisus]

Thank you for your reply!

I've read the NAND two times, everything ok. But when I click write ECC I get the following error:

ECC created
Version: 01
Flash Config: 0x00023010
Writing Nand
image_00000000.ecc
Failed to write 0x0 block
...
Failed to write 0x4F block
Done!
in 0:31 min:sec

Am I doing something wrong here?

 

[gavin_darkglide]

No, there are some bad blocks on the nand. Try writing using the demon/fusion option in the advanced menu. It will remap those blocks for you.