hello,
vgn-cr34 has a common problem there is a intermitten shutdown.replaced the fan and heatsink works for 1hr and shutsdown sometimes after 3hrs sometime 30min .does anyone know what this related to why this shutdown.please message me. thanks also i have vgn-cs series with same problem

Hi
Alternatively, the problem with thermo sensors, which sits on the SMbus. You should keep a log of temperature control and verify the thermal control chip. Check voltages at the main sites of the board (particularly Vcore)
In general, you must begin with a flash BIOS.

thanks for the reply.I have flashed various bios and also check thermal ic.in the end made the fan +B direct to 5V now works for longer time but it shut off only once during the day.i feel the vcore drops.

And what about a logs of temperature control?