My Thinkpad T61 was dead, due the power supply doesn’t work technician from thinkpad service center said the power supply is directly connected to the mainboard and the solution is the mainboard must be replaced with cost approximately Rp. 3.700.000 (ohhh god, i better buy a new one) finally i buy a ThinkPad T400 with default operating system Windows XP, and I have successfully upgraded to windows 8 😉
So, if you are using Thinkpad T400 and you want to upgrade to Windows 8, just try, because I’ve done it.
all drivers can be downloaded here