Some time ago (1.5 years ago?) I bought for my work great laptop – Asus c90s. Main feature of this model is that this notebook from Asustek is upgradable. It has MXM video card (standard GeForce 8600M GT 512mb), Desktop processor Intel Core 2 Duo Extreme 2.4 GHz with overcloacking function on the fly to 2.9 GHz, 2Gb of DDR2, etc. First thing to upgrade always is memory. At that step I realized the problem – its chipset allowed to put only 3Gb max. Bad thing but ok – I put 3 GB.
This laptop was a good working machine for me all this time. But several days ago stopped functioning. Shows black screen and that’s all. The notebook is old (though I cannot see modern notebook that could be much better than this one) but I looked to the warranty document – oh, I had 2 year warranty. Why not to use it? So I went to ASUS local dealer and I have good answer – ASUS warranty rules in my region (may be all over the world as well?) do not allow you to upgrade your computer!!! They did an upgradable laptop but they do not allow upgrading it. Very smart!
So I consider that if you are buying a laptop – do not look to such tricks as upgradability and buy from the very beginning the most powerful machine. Of course if you need such 
Popularity: 2% [?]
Did you missed any of these posts ?
Tags: ASUS, Asustek, laptop, notebooks, upgradable
Hmm i had the same problem with the c90s not working any more and only thing i got was a black screen. With me i knew the gpu was the problem so i tried baking it… like 20 min at 130-140°C with the result that it works perfectly again