ThinkPad T400 does not start, is turn on below the screen & turning HDD switch off in a loop

I put my Thinkpad T400 hibernation, but the next morning I couldn't start. When I press the power button, the lights under the screen turn on and I hear the sound of the hard drive and get it out. I don't even see anything on the screen. It is only black. The process continues to repeat in a loop, except if I press the power button to turn off.

I tried the static load, remove the thing.

I also removed the hard drive, put it back again, but not working anymore.

Help, please.

Solved the problem myself.

Removed the internal battery and reinstalled after 30 s.

It worked perfectly. Typing of him now.

Tags: ThinkPad Notebooks

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