I tried removing the battery for one entire day and did what you suggested as well (removing the battery and mmc and holding the power button).

I am pretty sure that the battery is alright.

I did not tweak the phone at all. I had PR 1.3 installed and avoided installing extras-devel. The phone was never overclocked. I had a few games, office tools with popular software such as opera mini and such. Prior to this problem I had not made any modifications (software installing) for at least 6 months.

That is why this is a strange situation.

As I said the phone turns on as such :

1. white led light

2. nokia tune - but absolutely no display

3. since I re-flashed the phone (without any displayed image or backlight on the tablet during the process) I noticed that after the nokia booting tune... there is a sound and light vibration when I tap on the phone....

should I change the LCD display or the phone motherboard or ???