NO POST (breadboard) not another nub post.

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Discipleoflife

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Feb 23, 2013
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OK so i was playing leauge of legend and my power went out. When power came back up my computer would not post.

I have removed ram/graphics/hdd/cdroms and did a barebone boot and still no post error messages.

I do not have onboard video.. and have tried a known working replacement graphics card. System still did not post.

I checked the voltages on my powersupply and (as far as i can tell) all pins are giving power within normal ranges (12 for yellow 3.3 for orange etc) checked 24 pin connecter 8 pin connecter 6pin graphics connecter.. Everythings getting power.

Short of removing the cpu (almost brand new and known working) everything is diconnected and i still get no post report.

I have computer (even modem) running thru surge protector. and my powersupply is fully functional.

the ONLY thing im worried about is during power outage i did attempt to hook it up to a generater. (needed finish work on computer) and it was sputtering up and down (the generator) as because choke wasnt set correctly and it couldnt run full speed. (current would go in and out but computer could not start/stay on because electricty would fall periodically). However, i assumed surge protector would prevent any damage.

CPU phase lights show full cpu functionality. (all lit up) however recieve no post beeps/errors.

Tried hard reset of cmos (remove-reinstall battery)

Also, i am not another nub. I have used all saftey precautions (static discharge braclet connected to chasis of computer (plugged in for ground))

I think this has occured once before (fixed by reseating graphics card... tried and didnt fix)

Any ideas?

 
Solution
nukemaster
When you did the clear cmos, you say you removed and reinstalled the batter. Was the system unplugged at this time and did you also use the clear jumper?

If the system is plugged in, it will take power from the standby portion of the power supply in many cases. The jumper is generally the best way to clear the cmos.

At this point, you almost have to start testing parts on another system if you can.

It is also important to know that generator power is not always that good because some generators have step wave or other not so good power forms. I can not see it killing a system, but in general most newer power supplies work better with sine wave power(like what you get from the wall).
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bigpinkdragon286

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Oct 3, 2012
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What are you calling a surge suppressor? Most people I know refer to outlet extensions as such, and that is a mistaken assumption. A good electrical conditioning device will give you both over voltage and under voltage protection.

Do you perhaps mean, your computer is behind a battery backed UPS device?

If you have poor power reliability in your area, and need to run from a generator, you might consider a generator rated to produce a more pure sine wave, which will help with sensitive electronic loads such as a computer.
 
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nukemaster

nukemaster

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Nov 23, 2004
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When you did the clear cmos, you say you removed and reinstalled the batter. Was the system unplugged at this time and did you also use the clear jumper?

If the system is plugged in, it will take power from the standby portion of the power supply in many cases. The jumper is generally the best way to clear the cmos.

At this point, you almost have to start testing parts on another system if you can.

It is also important to know that generator power is not always that good because some generators have step wave or other not so good power forms. I can not see it killing a system, but in general most newer power supplies work better with sine wave power(like what you get from the wall).
 
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Solution
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Discipleoflife

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Feb 23, 2013
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the computer is not hooked up to the generater at all.. 5 minutes after the attempt power came back on... Im in florida. with reliable power... and am plugged into a surge protector.

Your right i didnt think about that part of the cmos reset. I'll have to try the jumper.. but i've never heard of cmos causing a computer not to post before. is that really likely to be my problem anyways?
 
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bigpinkdragon286

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Like nukemaster said, you never know, and you've nothing to lose at this point but a bit of busywork. Another technique, if you can't locate a clear CMOS jumper, is after removing the battery, you can short the two contacts of the batter holder to drain the CMOSs internal capacitance. You will still need to be sure mains power isn't trickling in and keeping the CMOS up.
 
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Discipleoflife

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Feb 23, 2013
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OK SO i reset the cmos using the jumper. AND IVE GOT POST.
i seriously cant believe it and feel like a nub... New prob tho... it says my efi or whatever cannot find the map. (assuming this is my bios)

I DID FUCK UP i had the jumper in clear pos and forgot to change back before turning on the computer... changed it back and got this message... did i fuck up my mainboard?!?! HELP
 
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Discipleoflife

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Feb 23, 2013
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oy... so stressed that i had forgotten to reattach the hard drive... post and boot successful. once again.... feel like a tard. XD thank you SO much for the help... can anyone explain to me what might have been causing cmos issues and why cmos might prevent a post? as far as i knew that only contains information like time and date and such that carry over to next startup. What else does cmos cover that could cause no post? for future ref. and so i dont have to bother the awesome people at toms hardware again next time XD
 
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bigpinkdragon286

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Oct 3, 2012
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Lol, glad you got it working. Umm, CMOS pretty much dictates the opening act of booting your computer. If it's borked up with bad data, your computer could be trying to dial Mars, for all we know. I've only seen BIOS settings torpedoed by bad power once, but it had consequences. I will count your experience as #2. :)
 
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