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Old 09-12-2016, 08:23 PM   #1
bianchi77
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Join Date: Jun 2016
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Default POST clk LED question ?

Guys,

Can I see 33MHz from clk LED pin on POST diagnostic board connected on PCI ?
Or the value is something else beside 33MHz...
How can I know if there's clock on my motherboard ?
It says on the manual it must be on...
but sometimes I saw it's off and motherboard is running properly...
and in different POST it's blinking and motherboard is running ok...

I saw one, it's not completely on or off.....and the motherboard is not doing anything...so isn't there clock generated from clock generator ?
I've checked the crystal of clock generator, it's ok, but I'm not sure if the chip is doing the job....and I can't see which pin is outputing the clock for CPU/PCI...since there's no datasheet for that chip...

Any clues ?
Cheers...

Last edited by bianchi77; 09-12-2016 at 09:07 PM..
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Old 09-12-2016, 10:19 PM   #2
bianchi77
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Default Re: POST clk LED question ?

Probably, I can test from pin B2 and B16 with scope ?
http://pinouts.ru/Slots/PCI_pinout.shtml
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