Cant R/W from NAND after flashing with Xellous

[foouser]

Hey,
About 3-4 months ago I decided to finally get a machine to JTAG. I got a 16mb Jasper, and everything went perfectly - I got a full good dump of my NAND and had freeBOOT going for quite a while. It wasn't until two weeks ago that everything started to get really weird. Out of the blue, I noticed that every time I wanted to launch XexMenu, my Xbox would just reboot, although it would boot games and other homebrew like Flash360 just fine. I started to tinker with it, and got it to finally launch, but only with my HDD disconnected. I felt something was wrong, so I decided to reflash freeBOOT using Xellous (v0.032 with Dashlaunch patches and launch.xex installed), yet it didn't help. The Xbox would still boot, though, but with the same problem. I saw that Dashlaunch had a feature to map errors to UART so that in a case of an error, the machine would reboot. Therefore, I decided to create and flash a new image, but using a different patch-set. I then flashed the new image using Xellous, and that's when things started to crap out. Now every time I boot my console, it looks like it tries to boot (10-20 seconds of constant middle green light), but then it RRODs to error 0022.

I figured the diodes were off, since when I first did the JTAG wiring I used 1N400G diodes which weren't recommended, but still seemed to work. I got some BAT41 diodes, replaced the old ones, and still got problems. I then decided to re-wire my LPT cable and maybe try to reflash the NAND (figured there was something off with the NAND). I connected everything, using the same setup as the first flash, but then I couldn't get my PC to recognize the flash chip (got a "could not detect a flash controller" error). I already tried any method known to man to get my NAND recognized (short pins, forcing it using NandPro, you name it), I triple-checked my wiring and also tried to flash without resistors.

I'm really lost now, and I'm getting quite desperate on this machine, so any help would be greatly appreciated.

Thanks a lot in advance.

[bluemimmos]

ok if u have completed flashing your nand using xellous there must be the xellous in your nand. try booting your console using the eject button and xellous should load fine. if it loads then you can flash updflash.bin from usbstick and make sure it is freeboot image. give this a try, may help you out...

and the thing that your nand is not recognised, try to wire your xbox as cleanly as possible, sometimes a small damn mistake makes your nand not get recognized....

[foouser]

Already tried booting to backup Xellous. Still to no avail.
I also tried shorting the resistors next to pins 41-44 of the NAND. I guess it's as clean as it gets. To my understanding, the shorting of the NAND pins is needed only when the Xbox doesn't power on at all, which isn't the case for me (although I had to try it as some kind of a last resort option).

[foouser]

I've been trying different methods to get the flash controller recognized during the last few days, yet I still haven't found a solution. Tried using external 5V power supply to the NAND while leaving the machine's power supply out, bridging pins 41-44, 29-32 and even all of them, tried resoldering my wires twice already, and nothing.
Is it possible that I've blown the SPI port on my console whilst trying one of these methods?

I would be really happy if someone took a shot at this, and tried to guide me through this mess.
Thanks again.

[Arakon]

Quite possible, especially considering the NAND runs on 3.3V, not 5.