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Computer keep Rebooting before even get into Bios

by Glup-glup / May 14, 2013 7:47 PM PDT

I just built a new desktop PC with specs:

Gigabyte GA-P55-UD3l
Geforce GTS250 DDR3
Hynix DDR3 2GB 1Rx8 PC3 10600U (HMT325U6BBFR8C)
Seagate 250GB
i5 1155
Windows 8

The Pc been doing fine for a month or so. and suddenly it just keep rebooting even before it gets into the bios (it wont go the bios even if i keep pressing del)

If i just let it run and keep rebooting it will eventually get into the windows. but lately the rebooting sequence would run for the whole day.

There are no error with the RAM when i check it with windows memory diagnostic tools. The VGA also works well if i plug it into my other computer.

I've also check the motherboard with the service center, and there is nothing wrong with the MB.

is there anything else i should check?

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A Couple Of Things...
by Grif Thomas Forum moderator / May 15, 2013 10:07 AM PDT

1. An overheated processor will do such.. Remove the heatsink, then remove the old thermal paste, then reapply a new, THIN covering of paste to make sure the heat is being transferred correctly from the processor to the heatsink.

2. If you haven't done so, make sure you check the manufacturer's websites for the latest motherboard.chipset drivers, plus all other drivers, and possibly the BIOS update for Windows 8 and all installed hardware.. In some cases, it can be as simple as an updated video driver for Windows 8.

3. You've not mentioned the power supply.. Tried swapping in a different, known good power supply?

Hope this helps.


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Change Fan...
by Glup-glup / May 15, 2013 1:25 PM PDT
In reply to: A Couple Of Things...

Hi Grif,

Thanks for your response.

I do plan to update the BIOS and the driver last time since it is getting annoying.
but haven't got the chance,it just keep rebooting for 3 days now.

For the processor fan,I'm still using the fan comes from the manufacturer. I'll try get a better one.

The power supply is erSys 450W+ (I don't think this is pure)

if, I just let my computer keep rebooting. hoping for luck it can get in to the windows to update the bios and the other driver. is there going to be side effect to the other hardware?


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Yep, Could Be...
by Grif Thomas Forum moderator / May 16, 2013 2:48 AM PDT
In reply to: Change Fan...

Like any other electrical equipment, restarting your computer on and off could cause problems with the electrical system, although there's no way to really know till it breaks.. Much like a light bulb, it's tougher on the electrical components where electricity is cycled on and off.

In addition, if the operating system and other software never fully loads, you're asking for problems with corrupted data..

It's best to get it fixed as soon as possible.

Hope this helps.


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Unstable Electricity
by Glup-glup / May 26, 2013 2:30 PM PDT
In reply to: Yep, Could Be...


I take my PC to the service center and they found nothing wrong with it, temperature, memory, electricity, etc everything looks normal.

My PC even run smoothly over there without restarting even once.

So, I took it home. After a couple of days the symptoms start again.
I suspect it is the power instability from the electricity company.

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That power supply, is it a single +12V rail?
by R. Proffitt Forum moderator / May 27, 2013 1:36 AM PDT
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