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Computer receiving power but failing to start.


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#1 JoeyJoeJoeJrShabadoo

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Posted 27 September 2014 - 06:14 PM

Hello,

 

I have an oldish Dell Inspiron Desktop computer and recently I have been unable to boot it. 

 

When the machine is functioning normally, the power button glows amber when it is off/standby and white when it is powered on. Currently the light glows amber but pressing the button does not boot the machine, nor does the light change.

 

http://imgur.com/AHiqoDG - That looks like the correct case, but I have no idea of the specs.

 

 

Am I right in thinking this error is caused by the button on the case not working? If the standby light comes on, I assume that power is getting through the computer to the button, but no signal is getting back. Or is this another problem all together?

 

I have tried pressing the button with the case open and the rear fan appeared to twitch slightly when I pressed the button, but nothing else occurred. I'm not sure if this is relevant.

 

 

 

If I'm on the right tracks would changing the case be enough to solve the problem? I've identified the motherboard as this (http://www.geeks.com/details.asp?invtid=G43T-DM1-BO) board.

Would this (http://www.scan.co.uk/products/cit-clarity-mid-tower-case-with-2x-usb3-card-reader-and-black-interior) case be a suitable replacement? I can't find an identical one online.



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#2 zingo156

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Posted 29 September 2014 - 03:54 PM

It could be anything but most likely is a power supply related issue. Here are some things you can try without replacing any parts:

 

Make sure you have the computer unplugged from power while removing or moving any hardware...

 

Try 1 stick of ram in 1 slot at a time (remove all other ram sticks). Move it to the next slot until you have tried that stick in all slots by itself. If you still have no post, try a different stick of ram in each slot by itself. If you have issues with the stick in 1 particular slot (a no post for example) the slot may be bad. It is also possible you have a bad stick of ram instead of the slot being bad, in this case the ram stick should cause the same problem all slots.

 

You may have a memory controller issue in which case if you have 4 slots, 2 may not work. With intel it should be 2 slots next to eachother channel 1 might be slot 0,1 and channel 2 might be 2,3. Trying with 1 stick at a time in all 4 slots is the best way to test everything.

 

If you never get a stable system with just 1 stick of ram in 1 slot (trying all sticks by themselves) try removing all non essential hardware to get into bios:

 

Disconnect pci cards, pci-e cards - except a video card unless you have onboard in which case use the onboard video and pull the video card, hard drives, dvd drives, disconnect all usb headers as well. You should only have the power supply, main board, 1 stick of ram in 1 slot, the cpu and cpu cooler connected. You can also plug in a monitor and keyboard. Now try to power on the machine. If at this point you have no post screen or video etc, unplug the computer and pull the stick of ram, power back on and listen for a post fault beep code, you will need to hook up a motherboard speaker to hear any post fault code.

 

If you get no response next: remove all of the components from the computer case and connect only non essential hardware outside of the case, place the motherboard on a non conductive surface, a wooden table will do fine. Then try to power on again, you can short the power button pins on the motherboard, don't worry this is exactly what the power button does. Just touch a metal item to both power button pins to try to power the mainboard when outside of the computer case.

 

While you have the computer apart, look for blown or bulging capacitors on the mainboard and video cards etc examples: https://www.google.com/search?q=bulging+or+blown+capacitors+motherboard&noj=1&source=lnms&tbm=isch&sa=X&ei=Iz_YU6aDLsS2yASnjoKwAQ&ved=0CAgQ_AUoAQ&biw=1031&bih=603 please report any caps you suspect may be bad, you can take a picture and post here if you are unsure.


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