T500 Boot Problems

[Ramone]

I have T500 laptop, and after BIOS update, I got some problems with boot.
Laptop stuck on Lenovo Screen (sometimes before, just black screen) for 20-30 minutes minimum. Sometimes it boots normal.
In OS there are no problems, except the fact, that i can`t install AMT driver, so i tried to update AMT, but as it can seems, its impossible without driver..

Also i tried to reset BIOS by closing jumpers (w/o battery and A/C of course), pressing power button for 20 or 30 seconds and so on..

And i tried to remove all hardware (cd, hdd, ram, keyboard, touchpad, etc.) one-by-one.. no result

Can somebody help with that problem?
Thanks.

[Colonel O'Neill]

Any broken USB ports?

[Ramone]

Any broken USB ports?

usb ports are ok

[Ramone]

Tried today to downgrade BIOS to 1.19 version..
The same situation
Any ideas?