Brick ps3 (valid dump)

Hello there,

I got a brick ps3 that I'm trying to fix. Well I did everything correctly till the very last step (which I thing I did wrong). I'm really stucked and I would really appreciate any help. Here is what I did.

1- solder tristate to ground

2- update E3 flasher 001111 (OK)

3- creating dump 001000 (OK valid good dump)

4- downgrading with e downgrader 000001 ( 3 bips ps3 short down)

I think the part I miss was to flash back the original dump 100000

So here is my question if tristate to ground is to halt the ps3 why mine is shorting down by itself at step 4. Or can it be that the tristate is damage or something?

Could someone out there help me fix it. I wonder if the tristate ain't working anymore