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Posted 10 November 2014 - 06:10 PM
Posted 10 November 2014 - 06:30 PM
My vote goes to the PSU first. It is big enough to produce that type of smell more than once. Most everything else will be dead after the irst time.
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Posted 10 November 2014 - 06:52 PM
That and a psu is cheap and I think returnable, so always the easier choice , if you have another sufficent power supply in your house or can maybe borrow one from a family members older computer that migh help you save money.
Oh, and don't forget to check for blown capacitors, thats one thing you only need your eyes for
Edited by wishmakingfairy, 10 November 2014 - 06:54 PM.
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Posted 10 November 2014 - 09:41 PM
PSU + 1. Seen those symptoms many times before and it's usually the PSU.
Posted 10 November 2014 - 11:40 PM
Thanks for the replies.
Does not look good for this system! I tried a new PSU and still did not boot. Starts, fans spin and then stop after 3 sec with nothing on the screen. I tried a different GPU card, RAM, but still no response. Does that mean the motherboard is just shot. Is there anything else I should try? Thanks.
Posted 11 November 2014 - 04:44 AM
you could try a BIOS reset, locate the CMOS battery and remove it , reinstall after a few minutes and that resets the BIOS values.
Edited by synergy513, 11 November 2014 - 04:45 AM.
Moore's Law : 4d Graph in Progress
Posted 11 November 2014 - 10:33 AM
Check for blown or bulging caps on the mainboard examples: https://www.google.com/search?q=blown+bulging+capacitors+motherboard&biw=1262&bih=766&source=lnms&tbm=isch&sa=X&ei=4CtiVOybDYmTyQS194CoBA&ved=0CAYQ_AUoAQ
When a cheap psu goes out (bestec that hp uses frequently) sometimes they will destroy other components. Below are more things you can try.
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.
Posted 11 November 2014 - 12:00 PM
This is serious and calls for the MOBO to be removed and inspected. I'd begin around the PS connectors and associated discrete devices mounted nearby. This sounds like a regulator failure and would be found with a multimeter to check the junctions. One is surely shorted, causing the PS to shutdown.
Posted 01 December 2014 - 11:05 AM
Thanks for all of the great suggestions. I have concluded that the Motherboard has failed and not worth replacing. Client was okay with upgrading to a new computer.
Posted 02 December 2014 - 04:25 PM
Sounds like we have a plan.
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