Sorry to bring up an OLD thread, but I have been trying to do the exact same thing today. I have a Gateway MX3311b laptop equipped with a Sempron 3200+ Socket S1 processor. The motherboard of my laptop is the same as the original poster, and I have updated to the latest bios. I also scanned around to try and find whether the Turion X2 equipped laptops with the motherboard used the same bios, and it turns out they do. The motherboard part number is:
4001189RMotherboard w/NVIDIA C51MV w/o 1394 (FRU)
And further details can be found here:http://support.gateway.com/s/Mobile/...01189Rtc.shtml
So I have installed the Turion X2 TL-50 into the laptop, and as naton discovered, the message 'FATAL ERROR !!! Please change CPU!!!' comes on screen.
It could be a faulty processor, as it was purchased second hand from eBay, but I'm hoping I can find a way to sort it out without having to replace the CPU.
Thanks in advance for any help,