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Bluescreen occured three times. Now there is no display, mother board and hard disk still working.

Running : Windows 7, ddr2 1gb ram.

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Asking from mobile. Pc still not working. – Avin Varghese Nov 29 '12 at 7:02

THere are lots of issues can happened. You should diagnose by yourself. Try to remove and clean from dust all components. IF your pc has some bios signals, count them(e.g. 2 short 1 long) and then google for it depending on your bios version. In general you have to provide more details

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If I might add, you should also check the Event Viewer (evntwr.msc) for any critical errors in the system log when you get BSOD crashes. – EliadTech Nov 29 '12 at 12:28

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