Lumia 800 DEAD
 

Hello.
I have a Lumia 800 (don't know the history) which had a vibrator failure.
I have tested vibrator with multimeter and its ok.
The strange thing is that this morning when I wanted to start the phone, the vibrator worked and I said that, well, good surprise.
After put on all the screws to motherboard, no power at all, completely dead.
Until now, the phone powered when it wanted, sometimes from first try or after 3/4 tries.
Now, nothing, I have reheat the Power IC, nothing, checked capacitors like in solution, all ways are ok.
Battery is charged, I have 4.3V on VE
Some sugestions guys ?

Reball power ic......and change