Black screen, no fan, or rarely screen flickersHi, I have a Sony Vaio VGN-NR21Z (model PCG-7121M). It was working well for a few years (2009 to 2013). Then after what...
Answer to "Notebook Vaio: How can I be sure it's the motherboard and not the cpu?"I have the same computer (Sony Vaio VGN-NR21ZS) with exactly the same problem. If you have repaired yours, Luca, then I would like to know what you did.