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CRASHED! A topic for SEVERE and immediate Hardware and Operating System FAILURES. We will try to get you up again. NOT for Optimization questions!


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  #1 (permalink)  
Old 21st January, 2007, 02:36 PM
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Before posting try this first!

If you are in the situation that your PC is refusing to boot, the I recommend that you try the following steps before posting up your issue, you could save yourself a lot of time.

If your computer was working immediately prior to the failure then you can normally discount these following steps, if the PC has been out of use for a while or moved recently then it is a good idea to go through this checklist first, the points here are not to patronise but it is often the most simple, obvious things that get forgotten when troubleshooting, you should always start with the simple things and work up to the more complicated possibilities

- Check all the leads connected to your tower, make sure they are all seated properly and have the minimum connected for a successful boot, in most case this is the power cable for the PSU, mouse, keyboad and VGA..

- Check the inside of your case, make sure that none of the cables have come loose and that the memory and add-in cards are correctly seated.

Now we move on to the less obvious...

- If you can hear the fans working in your PC it is wise to check if any are not functioning, for example if the GPU/CPU/NB fans are not working you can assume in most cases that this component is causing the boot failure probably through overheating.

- Check your motherboard and add-in cards for signs of capacitor bulging/leakage and check that no components on these cards are visually charred or otherwise damaged.

- Reset your CMOS, do this by shorting the jumper described in the user-manual for your motherboard, this is often located near the battery on your board and with be marked "CMOS" or similar.

- If the above fails then it is worth performing two more related steps...
-- Check that the CMOS battery is not flat by replacing it with a known good battery
-- Remove all power cables from the board(PSU included), remove the battery for the CMOS and leave the board for 20 minutes or so, then replace cables and battery and attempt boot...this has solved a suprising number of boot problems.

Narrowing down the components at fault.....

The complete boot failure of a system can normally be narrowed down to a single component, finding which one can be a lot of hassle, however trying these steps first may speed things up....

- Remove all hard-drives and CD/DVD-ROM drives from the system, whilst these can cause boot issues later on in the process they will not normally cause a total POST failure.

- Remove all sound cards, network devices and physics card from the system, if the system then boot the failure can be attributed to one of these add-in cards and trial and error with those devices will lead to you find which is causing the issue.

- Using a multimeter you can check the voltages your PSU is outputing(or not as the case may be), connecting a fan and single drive to the PSU and shorting the PSU to start it(normally a green and adjacent black wire; see diagram below). then use you psu to measure the volatage across the red and adjacent black wire on the molex (should read approx 5v) and the same with the yellow wire and nearest balck wire (should read approx 12v).
If the readings are more than 10-15% out then this could be your problem.

- Finally remove the graphics card and memory give the contacts a visual check, clean with a lint free cloth while making sure you are grounded and replace them, often a dirty contact can lead to a boot issue.




Once you have tried the above steps it becomes more hassle, unless you have the time and money to swap your current components with known good ones(expensive and time consuming) more detailed trouble shooting is required, post up in this forum and someone is always around to lend a hand.
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Old 21st January, 2007, 05:02 PM
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Thank you Monkeyman! I've copied this over to AOA FAQ.

I took the liberty of changing your title a bit to ensure clairty. Again many thanks!

"No Boot? Before posting try this first!"
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Old 21st January, 2007, 06:22 PM
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Cool, thought it may come in handy as we get a lot of people asking "what is wrong?" with little or no info and sometimes these posts can get ignored, by having a look at this first hopefully people can pose more specific questions that can be more readily answered.

Title is much better BTW.
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Old 21st January, 2007, 10:01 PM
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My pleasure!
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Old 21st January, 2007, 11:48 PM
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just a small note. When checking that cables are seated ok, its best to unplug and plug back in again, inspecting plugs for any signs of damage/warping.

Work your way in is a good idea to, dont just jump straight in there. Ensure power cords are ok (if monitor is powered ok, swap with that cord).

Listen for beep codes too, they can be quite helpful, especially if its a no memory detected beeb code!

also if you have 2 sticks of RAM (or more), it can be one of these causing the failure or one of the slots on the board. Try each stick of memory individually in each slot to work out if its board or which stick is causing the headache
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Last edited by Toro; 21st January, 2007 at 11:48 PM.
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Old 29th January, 2007, 07:20 PM
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maybe this should be stickied?

just an idea
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Old 29th January, 2007, 07:30 PM
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See post #2 above. It's right below post one. If you scroll all the way up and run into #1, you'll know you've gone to far. Just back off a bit on the scroll bar, ease up until you see a #2 in the top right hand corner of the post below the first post.

If that doesn't work out for you, post back here and we will try to set you straight!

Hey! How often do I get a chance to help out a friend!? ":O}
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Last edited by Daniel ~; 29th January, 2007 at 07:40 PM.
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Old 30th January, 2007, 04:37 AM
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I am not sure I have this clear...so let me recap. post #2 is below post #1.

Has 2 always been after 1 or did you make this up?
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Old 30th January, 2007, 10:28 AM
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Thanks for the guide Monkeyman, it rocks!
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Old 30th January, 2007, 05:07 PM
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Quote:
Originally Posted by Samuknow
I am not sure I have this clear...so let me recap. post #2 is below post #1.

Has 2 always been after 1 or did you make this up?
I'm sorry Sam, this was a secrete communique, Toto and I wish you wouldn't employ your communicator ring unless specifically asked to...there are a lot guys who would like to have that ring ya know....guys who would use it responsibly!

Wait! You mean I sent it in the clear! Everybody! Grab your poison pills!

(This has been a presentation of Daniel's theater of the Web! Tune in next week to receive instructions for the use of poison pills and Don't forget your decoder rings!)
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Old 30th January, 2007, 11:20 PM
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1000 apologies....

[puts decoder ring back into drawer] sigh, I honestly do not know what I was thinking. Please resume your super secret communications...
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Old 31st January, 2007, 05:32 PM
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Like with many super secrete communications...I forgot what I was going to say....and now there's no one to remind me...sigh...
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Old 1st February, 2007, 07:21 PM
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ya i saw it in the FAQ section, but the FAQ section is way down the board, and this forum is right at the top, and people being people may not find it for various reasons, eg not knowing its there, not searching properly, or just plain old fashioned laziness.

Just an idea
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Old 1st February, 2007, 10:24 PM
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Well at very lest, you know what you want....and why...Stickied.":O}
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Old 2nd February, 2007, 12:03 AM
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thankee Daniel... I knew you would do my bidding one of these days lol
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Old 2nd February, 2007, 08:28 PM
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That's me! All bitched out and no where to go! LOL
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Old 3rd February, 2007, 12:22 AM
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Zing zong zang! Hinkow Winkow Yillow!

You know what to do, Samuknow.
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Old 11th February, 2007, 04:29 AM
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Quote:
Originally Posted by aghastpumpkin
Zing zong zang! Hinkow Winkow Yillow!

You know what to do, Samuknow.
???????????????
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Old 30th October, 2007, 12:21 PM
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and shorting the PSU to start it(normally a green and adjacent black wire; see diagram below).
This works for 24pin PSUs also.
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Old 23rd December, 2009, 05:56 AM
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collection agency

just do it
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