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reset to boot

by bbmak / January 13, 2007 3:03 PM PST

MOBO is Biostar Biostar P4M890-M7 PCI-E LGA 775 for intel socket 775
This MOBO. is brand new just out of the box.

1) Press power switch.
2) Power lights in case comes on: HD turns on, CD and DVD drives indicator light turns on then off, Floppy disk indicator light turns on then off, all case and CPU fans run OK.
3) Motherboard does not boot, no beep sound; LEDs are both off. Screen has no post.
4) Press "reset" switch. and all works; POST runs, computer boots and runs fine.
All loaded programs run well. I run the operation system with no problem.

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Interchange the reset switch with the power switch.
by ahtoi / January 13, 2007 3:40 PM PST
In reply to: reset to boot

This should tell you what the problem might be; assuming all the connections are correct. Good luck.

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Re: reset to boot
by bbmak / January 13, 2007 3:45 PM PST

but i am sure that the front panel pins are correct

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What if the pwr. switch is bad,
by ahtoi / January 14, 2007 3:29 PM PST
In reply to: Re: reset to boot

You check it with an ohm meter already? A hint; both the pwr. and reset switch are the same type.

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RE:reset to boot
by bbmak / January 14, 2007 4:21 PM PST

I checked the board in different ATX case.

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I've seen that.
by R. Proffitt Forum moderator / January 13, 2007 11:06 PM PST
In reply to: reset to boot

It was usually an overloaded power supply or a defective motherboard or hard disk.


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Re:reset to boot.
by bbmak / January 14, 2007 2:41 AM PST
In reply to: I've seen that.

Well then I guess is the motherboard.
I tried 3 different power supplies on that board, and I didn't connect my hard disk when i test it.

Do you think i could be the ram or cpu? Is this ram and cpu have problem, it shouldn't be like that. The mobo should use "beep" to indicate it right?

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Just sharing the most common items.
by R. Proffitt Forum moderator / January 14, 2007 2:54 AM PST
In reply to: Re:reset to boot.

The other parts are indeed "possibles" including that CMOS battery. But we can rule that battery out in seconds by using a voltmeter on it.


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Re: reset to boot
by bbmak / January 14, 2007 3:01 AM PST

but my computer time didn't reset after i shutdown.

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Why would that be a good test?
by R. Proffitt Forum moderator / January 14, 2007 3:24 AM PST
In reply to: Re: reset to boot

Sorry, that's not a good test. Imagine how many boards would be replaced if I didn't pull out the voltmeter and used that (reset time) as a test, then swap the board and used this as proof the board was bad.

Sorry, I disagree here.


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