I have Asus Eee PC 1015PEM with following problem.
When i plugged in AC adaptor jack into the laptop its automatically power on and stuck in a loop. which means power leds light up and turn off, again light up and turn off. nothing on the screen. I check all the mosfets and caps for defect components and they all are fine. Where should i start for solve this problem?

flash the BIOS to start, but keep the original

You mean dump it before i do anything ryt?

Reset the first defense. If you do not help, then ask for another worker dump

OK i have ordered new BIOS reprogrammer which is supporting latest BIOS chips.I'll update the BIOS and let you know the results.

I have replaced the 3.3v 5v regulator and BIOS updated as well. I think problem was in 3.3/5v regulator.