don't think there is such service to replace wii motherboard in malaysia. wii is proprietary to nintendo, so is not like repairing a PC.

did u happen to do a wii system update either through internet (through wii setup), or through a game disk? (when u insert the game disk, it will prompt you). most crashes are due to these reasons, and if it is due to these, there is nothing much u can do but buy a new wii.

i like a new handphone motherboard too

for d benefit of readers, do u know how it crash, or what happen just before it crash? wii is known to be very reliable.

if u softmodded it, part of a well known sop of softmodding is to save the NAND. so that u can recover back to original virgin wii during times like this. but if the wii is bought already pre softmodded, well..... u need the NAND or another wii.