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reset to boot

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.

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

In reply to: Interchange the reset switch with the power switch.

but i am sure that the front panel pins are correct

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What if the pwr. switch is bad,

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

In reply to: What if the pwr. switch is bad,

I checked the board in different ATX case.

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I've seen that.

In reply to: reset to boot

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

Bob

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Re:reset to boot.

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.

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.

Bob

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Re: reset to boot

In reply to: Just sharing the most common items.

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

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Why would that be a good test?

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.

Bob

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