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I tried upgrading my Sony VAIO PCV-RX660 with a Celeron 2.7ghz CPU. It won't even boot. It turns on and a dummy (hdd/cpu) light comes on, but no booting or anything. If I put the P4 back in, everything is fine. The mobo the Celeron came off of is a mPGA478 socket, where the VAIO (the one i'm using) is a standard 478 socket. The bus speed is the same and all that, i just want the better CPU. Anything I can do to make it work, or am I up the creek?

The Celeron came out of a HP a305w.

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The exact model numbers of the motherboard in the Sony and the CPU from the HP would be handy. –  Windos Aug 29 '11 at 20:42
    
The donor HP mobo is an Emachine (made by Imperial) 137001link and the recipient modo is a Sony/ASUS p4b266lm. both CPU have 400mhz FSB from what i read. I read an article that says the bios upgrade i put stops it from taking 2.6ghz or higher but they have put higher CPUS on the same mobo link. –  Matthew Aug 29 '11 at 21:36
    
here some specs on the recipient machine's mobo. it's essentially the same, minus the locked bios and extra 2 PCI slots. –  Matthew Aug 29 '11 at 21:49
    
Newest BIOS update is in? On the asus support pages for the mobo, a 2.7 Ghz cpu is only supported in latest beta BIOS. Risky, especially if the Sony version has a modified layout. –  Turbo J Aug 30 '11 at 6:59

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