What could be possible reason ? I doubt either Mobo or SMPS.
The mobo has diagnostic LED which light up during POST in case of any error/ issues.
The SATA & PATA IDE LEDs are switching on in my case during POST. This have written this to Gigabyte support three times, but they aren't ready to accept that SATA controller on mobo can damage the HDD. I've also got my SMPS checked at cooler master 's service center and they say it ok.
I've tried changing my seagate's baracuda HDD with WD's Green cavier, but result is same. WD's HDD developed bad sector after one month. My PC usage is very limited to browsing & mailing. There are no games installed.
can anyone suggest whats could be the possible cause of the problem.
Gigabyte are right. The storage controller cannot damage the HDD.
What precisely do you mean when you say your hard drive is crashing? Do you mean that you get a blue or black screen occasionally? Or do you mean you can no longer boot into Windows?
One thing to check in your case that your hard drive is getting suitable ventilation. Use speedfan to see what the hard drive temperature is like.
Hard drives can just plain fail regardless of their age. You should pay attention to SMART data and make regular backups of your data. Perhaps consider using enterprise versions of hard drives as these as designed to be more reliable. Alternatively set up RAID 1.
Maybe its the sata cable? I have had a bad ide ribbon cables before and replacing the cable fixed the trouble. So far i have not seen that happen with sata cables yet.
A new sata cable is so cheap, or maybe you already have one, it's worth a try who knows?
Might consider downloading and using HD Tune, either the free edition or Pro edition, and thoroughly evaluating you HDD now and intermittantly. It has multiple HDD tests built in, including a Health Report that looks at all the S.M.A.R.T parameters including temperatures, sector reallocation, etc., Read/Write speeds, and an Error Scan that checks all the used sectors or all sectors on the HDD.
Another very good minimal cost program is ActiveSmart, which runs in the background and graphs out all the parameters such as temp, and will alert you if you are experiencing significant sector reallocation or other changes.
That way you will know if it is a HDD problem, a temperature problem, or something else.