I found a thread from HP
http://h30434.www3.hp.com/t5/Other-Notebook-PC-Questions/Startup-Error-System-Temperature-90D/td-p/158801/page/5
But i am so lazy to create account and post, so just post it here.
Just a easy way to test: remove your battery and press power button to start.
If you have the same problem, plz try this and post your comments here. Thanks
