ddr2_200pinIts not so bad to actually know how to troubleshoot your own computer.It iw quite advantageous to learn what to fix and how to whenever there is a problem as it can also decrease cost of having someone to fix it up for you. Upgrades are also easier done if you know how to. An experience I had recently on what happened to my computer is that it would not boot up one day and careful examination, I found that the laptop memory was not working so I guess I needed to procure another memory and take its place. I needed an original Dell memory as this computer was quite picky and worked only with the original dell memory module. I had a spare memory at home but problem was that it was a Mac memory so guess it was useless to try that one.. Good thing I know a good site where I can always find what I need for spare parts like in www.memoryupgrade.pro as they are reliable when it comes to stocks of spare parts.