CECH-3004A KTE-001 motherboard bricked with progskeet

[ed1973]

I recently wanted to downgrade a 3.66 ps3.

Model number: CECH-3004A
Motherboard: KTE-001 (used JSD-001 diagram)

What I did was:

1) Updated to 3.70
2) Installed Progskeet chip
3) Read the 16MB NOR with Winskeet (version 40000_111004)
Made 3 dumps and CRC checked them and they are exactly the same.
4) Created a downgrade.bin with the patch tab
5) Tried to write back the downgrade.bin via progskeet to the ps3 16MB NOR and failed.
Eventually the write failed with:

[2011-11-04T18:00:41] Flashing address 0xd40000 (128 KiB)
[2011-11-04T18:00:45] Verifying address 0x40000 (128 KiB)

and it did hang on Verifying address 0x40000 . I needed to shut off the ps3.
When I then turned it on, it shut off after 5 seconds with no red light. In other words, the ps3 is bricked.

When I tried to write back the original dump it also failed, with the same results. I am now in a state where I do not know how to continue. What do you think.

I also made a dump after the first write, so that dump is different then the downgrade.bin.
I can check and see that are the differences with a hex editor which I will do later.

[ed1973]

I did that with the ps3 without power cord, the write seems to be succeeded, but the verify failed on all the addresses:

[2011-11-07T17:32:04] Verifying address 0x0 (128 KiB)
[2011-11-07T17:32:04] Verification of address 0x0 failed

also the ps3 did not behave correctly, only the bricked symptoms. What do you think went wrong ?

[ed1973]

Thanks for your answer, erasing the flash before writing did the trick.

But I could only write back the original 3.70 dump, after which the PS3 was working again.

But when I wrote back the downgrade.bin it did not work.

What do you think, can this model be downgraded ?

[Abkarino]

No your console model can not be downgraded now don't wast your time and don't try again>
Just wait maybe a new downgrade method appear soon

[ed1973]

Thanks for all your nice answers.

I will restore 3.70 and will remove the progskeet chip, what's the best site to keep track of the news concerning the downgrade of the CECH-3004A model ?