Bricked console without dump [very banal].

First I wanna to thank 3absiso for every help for every people.
1. One man give me a console and said that, he (or someone) trying to downgrade without reading backup dump.
2. I take a console and make a several backup dump (a clip seat perfect - I use an additional paper layer to press a clip inside motherboard).
3. All dumps are the same and same extracts with FlowRebuilder v.4.2.3.0. and BwE Validator.
4. I patch the dump and flash a console. Then I see same black screen and console turns off after 30-40 seconds.
5. I flashed the original dump back and see a same how console immediately turns off. So I make a backup dump again and compare with first dumps. All nands are same.
6. Then I try to downgrade console through E3 Flasher option (all switches down, but last switch up). Result are the same: black screen, no any reaction to inserted Cobra Dongle, turns off after 40 seconds with or without inserted dongle.

I already used a

PS3 Nor Dump Patcher v0.01
BwE Validator v1.1
BwE_NOR_Validator 1.19
PS3 Nor and Nand Auto Patcher v0.04
PS3 NOR Patcher v1

After last two patches a console turns off with 2-3 seconds.
Inside a dump [offset 0003F090] console serial are not match, but HDD Serial matches [at offset 00F20200].
Please, help to restore a console who can.
If you need my dump - pm me, and I give him through e-mail, because the links are forbidden.
Thanks for your time and pardon me for my bad English.