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Solve : PC wont power up?

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i built my girl friend a computer. never had an issue till she left it on in a thunder storm. when power came back on she turned on comp and nothing. she brought it to geek squad and they said her "PSU was fine its prob the mobo". bought her a new mobo, hooked everything up, and when i turned it on the fans would spin and then turn off. spin then off. so i bought her a new PSU. same issue. bought new CPU same issue. there are no beeps. took out RAM and no beeps.

please help! girlfriend is bugging the crap out of me!! lolSo you mixed new parts with potentially cooked parts? or is the new motherboard with new CPU, RAM, and PSU?

If you mixed new parts with old parts that could be bad you have to go through a process of elimination to try to FIGURE out what is the cause of the failure.

Generally a PSU is the first thing to blow or stress with a good surge and no protection, however if your still on dial-up and the modem got HIT it can blow the 56k modem and the modem can keep the system from posting/booting up properly.

What parts are new and what parts are from the old build. What are the make/model# of new parts and make/model of the computer that is being repaired with these parts. You might have a mismatch such as memory etc.first i replaced the mobo (cause i was told the PSU was ok). i replaced it with the same board i had before. gigabyte Z68A-D3H-B3.

then when i saw what it was doing i replaced the PSU. old one is Antec neo eco 620W new one is a kentek 700W (POS)

then i changed out the CPU with the same kind intel i3 core 2120 3.3 ghz.

then i talked to a pc repair guy and he said to take out the memory and see if i get a beep, which i did not. i didnt change the memory cause i figured if i didnt get a beep theres something else going on. memory is 2 4gig corsair vengeance

then i came on here and here we are...Is there a speaker connected here as shown in the pic? If no speaker is connected you will not get a beep code output. Some boards come with speaker soldered on, but this board requires one to be connected in order to get your beep codes.

I have seen many times in the past with people bringing me computers and they claim they do nothing, no beep codes etc, and then I open the panel and there is no PC Speaker connected. I connect my spare PC Speaker and its screaming about memory etc.


[recovering disk space, attachment deleted by admin]well as a matter of fact......NO! (feel like a noob) never even thought of that.  ill take the one off mine and put it on hers and see what i get for beeps. im sure theres a PAGE on here with all the beep codes. youve been a big help thx!No problem... Hopefully your board will be able to tell you the root cause.

Here is a pic with beep codes for that board from the manual page 97 here: http://www.manualowl.com/m/Gigabyte/GA-Z68A-D3H-B3/Manual/207322

I like to use the beep code look up for the manufacturer of the board to look up codes that are not the norm. While most the of the common beeps will be listed, sometimes there are special beeps that are different that can tell you more than the basic common beeps if a different beep pattern is observed. Laptops are even more fun with different blink codes that change between models.



[recovering disk space, attachment deleted by admin]well i put in the speaker and no beeps This board has integrated video, so I would unplug all that is not required to post, disconnect all DRIVES, remove video card or any other cards that were added.

Make sure the power supply is connected with the large 24pin and then make sure the 4 pin 12volt is connected. Connect monitor to the VGA port of integrated video and see if you can get it to boot.

If no boot, remove ram and check for beep code again. If no beep code then it looks to be a bad board possibly, but make sure the new CPU was installed and not the old CPU before claiming bad board.

I have also seen boards before that have had bent pins in the CPU socket cause no beep codes before or thermal compound getting into the socket before and doing this, but generally its a bad board when it wont give post beeps. CMOS reset can be attempted, but I dont think it will help. Quote from: craven on August 08, 2013, 03:22:11 PM

ishe brought it to geek squad and they said her "PSU was fine its prob the mobo". bought her a new mobo, hooked everything up, and when i turned it on the fans would spin and then turn off. spin then off.
  Techs with electrical knowledge could have said exactly what is defective before replacing anything.  And without disconnecting any wires.

  Apparently he did not know of a power controller that decides when the PSU powers on and off.  Your power controller apparently sees a problem and powers the PSU off.

  If that tech had basic knowledge, then he had numbers from a multimeter that quickly pointed to a suspect - without 'it might be that ...' reasoning.

  Get a meter.  It sells for even less than $10 in some stores.  Ask for directions.  Measure six wires.  Post those numbers.  Then have an ANSWER without speculation; that says where a defect does and does not reside.
You said you put in the speaker. Didn't the case already have one in it? Did you make sure you plugged the cases speaker into the correct pins on the Mother Board?
From what you're describing it sounds like the Mother Board isn't getting enough power. This could also explain why your not getting any beeps codes.
As DaveLembke mentioned, did you make sure you plugged in the 4 pin to the Mother Board.yes everything is plugged in. i even tried the other 4 pin just in case but still nothing.  i dont think it powers up enough to even get to the beep.

i havent tried a multimeter yet. ive had family in town that havent seen in years, so havent had time to work on it.


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