Pc shuts down in 3 secs

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Friday February 6, 2015
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Hello,
I was using my PC last day but now it is not starting and shuts down automatically after 2 secs, I have asked to others they told me to up plug cable and press power button for 60 secs, I tried it start one time but still wasn't getting signal, I have checked ram, hard disk CPU fan, processors,,,
my PC is win7 based and 5 years old,,,
I am only 13 years old I am afraid of my father so I am asking answer in this forum,,
hardware:
CPU: AMS phenom ii
graphics: anti radeon HD 4250
ram: Kingston 2gb
harddisk : 500gb
motherboard: gigabyte
I had already used thermal paste

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Posts
3569
Registration date
Friday February 6, 2015
Status
Moderator
Last seen
July 18, 2016
870
Hello subhash,

Lets answer my questions,

1) Did you see whether your power supply unit got no power after 3 seconds or only your mother board attains no power( see processor fan and mother board LED light if have)

2) Did you change your computer power cord with another one?... (may be faulty one cause this)

3) what about monitor at start up? Did you see "No signal" message in monitor during startup?


Note: Read my questions carefully and then answer it, answer one by one seperately do no mix it.
Hardware Technician