Hardware problems with T68

[Hedis]

I have big problems with a T68.

Earlier today it started itself automaticly when i inserted the battery. Then the phone worked alright. (calling, etc)
But if i switched it off it will never power up ok again.
It starts if i hold the "ON" buttom down all the time. But if i release it the phone dies.

Later today the phone wouldn´t start automatic any more. It only works if i hold the ON button.

I tried to flash it but EMMA didn´t recognize the phone.

I have tested with many different batteries.

At saturday i will make a nice bath with alcohol to the phone
Any one think´s that a Isopropyl alcohol bath will damage anything at the card? a friend said something about the glue around the BGA ic´s. Of course I only mean the "main board "

Sorry for double posting but i don´t think the SonyEricsson board was the right decission.