How to recover BIOS after bad flashing?

Hi.

I need honest and straight answer. I was flashing bios, but after reboot, laptop doesn't work. I guess that I chose wrong ROM to my chipset, because on the case it's X53S, but on motherboard it's K53. Now I've got black screen, fans aren't spinning, no sound. Only LED on power button is flashing (sometimes pulsing, when I'm trying to shutdown). LEDs on capslock and others also are flashing. What can I do now? Is there any solution, like shortcut to recover default version of BIOS on ASUS? Or I need to do something more difficult like connect bios chip to LPT cabel and flash with spipgm? I don't want to take this notebook to service. First I would like to repair this by myself.

Asus X53S-K53 Notebook