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Old August 8, 2015, 01:20 AM
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Unhappy Asus P5N-MX no display/post

Hello guys, im very sry if i post in wrong category.
I need your help.

My Asus P5N-MX dont display anything, i dont hear beeps so i cant diagnose problem.
Disconected all components,clear CMOS, press power button, fans spins,LED turn on but no display or beeps.

Processor: Intel E6750
Processr 2: Intel Celeron 430

Strange thing happened when i changed processor to 430,i got display and beeps. After restarting no display or beeps.

I think that BIOS have some connection to this problem?
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Old August 8, 2015, 03:43 AM
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I see that E6750 is listed on support list of motherboard with bios 0202 with 430 same bios version

430 LGA775
E6750 PLGA775 Core 2 Duo E6750 (2.66GHz,1333FSB,L2:4MB,rev.G0)

look for any any bent pins in cpu socket

also look at caps on motherboard if bulging

with asus update get current bios P5N-MX BIOS 0903
Support new CPUs

Last edited by KaptCrunch; August 8, 2015 at 03:49 AM.
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Old August 8, 2015, 06:50 AM
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Quote:
Originally Posted by KaptCrunch View Post
I see that E6750 is listed on support list of motherboard with bios 0202 with 430 same bios version

430 LGA775
E6750 PLGA775 Core 2 Duo E6750 (2.66GHz,1333FSB,L2:4MB,rev.G0)

look for any any bent pins in cpu socket

also look at caps on motherboard if bulging

with asus update get current bios P5N-MX BIOS 0903
Support new CPUs

Thank you for reply.
No bent pins(i allways take care of that)
All caps are in great condition.
No dust over motherboard.

I dont know what else could be,il try again to turn on and update bios.
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Old August 8, 2015, 04:57 PM
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or something is shorting out ..... remove MB

try out of case
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Old August 9, 2015, 12:06 AM
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Start with process of elimination. Remove the motherboard from the chassis, and attempt to POST it. Do this on something that doesn't emit static electricity. Check the CMOS/RTC battery. $2 for a new battery solves a lot of BIOS issues with a motherboard. If it still doesn't POST, then we have another Intel/NVIDIA based motherboard that has bit the dust.
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Old August 9, 2015, 09:00 PM
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Dead battery or a short would be my guess.
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Old August 9, 2015, 09:24 PM
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I always look first to reseat the memory if there is no display or POST. Second would be the video adapter.
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Old August 10, 2015, 10:59 AM
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You check the psu? Ive had similar issues when one of the rails decides to arbitrarily go kaput.
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