What exactly did he do when he "tried a new harddisk". I mean, he had to install Windows on it, so it's interesting to know when exactly that failed.
Anyway, it might be time to try a new motherboard or a new laptop.
When i turn on my samsung R439 laptop it turns off automatically after few seconds.The laptop service man checked my harddisk,It was ok.then he tried a new harddisk for my laptop.But the problem remained same.
Then I tried a live USB linux mint.With the pendrive my Laptop runs well.I can also access the harddisk data from live linux.But with any kind of harddisk it is not running.What is my laptop's problem.please, Can anyone suggest me what should i do??

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