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Inspiron 530 desktop rapid power on/off

motherboard hard drive switch

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#1
geno368

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I have been trying to trouble shoot the Windows 7 system which would not boot.  I immediately checked the PS with a tool I have and also did the wire short test (black/green wire on connector)  It showed to be good.  I then re-seated the 2- 1gb ram modules..still nothing...It will power up the fans and sometimes give me a single beep and then it dies.  I push the power switch...nothing.  I unplugged the power and pushed in the switch for 1 minute and it does the same power on as I mentioned above. I then looked for bulging caps...none.  I then installed a new PS with same results.  I then removed the heat sink and processor and cleaned and re-installed new thermal compound...now, it powers up and off repeatedly every 2 to 3 seconds.  Cmos batt is 3.15v

I forgot to mention when I installed the new 430 PS, it allowed me to go into bios to check some settings and then loaded the OS and I started running Malwarebytes scan.  I came back to my office 2 hours later and it was dead again.

 


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#2
RKinner

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You might want to redo the thermal paste.  It sounds like it is now getting too hot and shutting down in self defense.  Could you have installed the fan backwards or left it unplugged?  Is it turning now when you power up?


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#3
geno368

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Thanks for your reply....I think you may have hit the nail on the head.  I added more arctic silver and it was not responsive until I shorted the on/off switch. It booted fine and I am doing a sfc scan now.   I wonder if the switch is bad?


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#4
RKinner

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Sounds like it.


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#5
geno368

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I am going to order a switch and if it is fixed I will mark as solved...Thanks again for the prompt help


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