hi everyone can anyone help me upgrade my imac.

http://www.everymac.com/systems/apple/im...

core i5 2.66 (2009) 27" which higher processor i can upgrade to core i7 . many thanks in advance

hello mr Walter

I need bit help when I put my MacBook Pro to sleep, after the taking lid back to normal,

the screen stays black. the keyboard does not wake up the screen. the not even power button, I have to power on and off 3 to 4 times to make a normal boot. do you think something wrong with sleep sensor, ?

if i change this part, it will resolve the problem

many thanks

Many Thanks!