[Gta04-owner] Help with a bricked GTA04...

[NeilBrown]

Hi,
 my GTA04 has turned into a brick, and I cannot succeed in unbricking it.

I managed to get a old x-load.bin installed in the NAND flash which doesn't
recognise the 1GB flash chip.
So when I boot without holding 'aux' down it says:

Texas Instruments X-Loader 1.4.4ss modified for GTA04 (Nov 30 2012 - 14:24:46)
Unknown chip: mfr was 0x2c, id was 0xb3
Unsupported Chip!


If I try booting with the AUX key down, it first tries a serial boot and then
after a timeout it tries to boot from NAND again and fails again.
I thought that it would try to boot from MMC inbetween those two, but
apparently not. (previously I always boot entirely from MMC).

So I read through 
   http://projects.goldelico.com/p/gta04-main/page/SerialBoot/

and tried it all out, but I cannot make it work.

pserial seems to successfully upload the x-load.bin, but ukermit never does
anything useful.
If I start a terminal program after pserial finishes, then I either get
complete silence or an infinite stream of

  X-Loader hangs

messages, sometimes precede by an "Unsupported chip" message.  When I compile
x-load myself it gives me complete silence. If it printed something I might
be able to work with it, but ... nothing.

Any suggestions?  Either to figure out what is wrong with x-load, or to get
the gta04 to boot from MMC despite there appearing to be something valid in
NAND.

Thanks,
NeilBrown
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