Has my motherboard or PSU blown?

25 pts.
Tags:
Desktop
Hard drives
Motherboards
Hi, my name is Peter and my desktop computer I built myself has stopped working after a year and a half. It happened when I was vacuuming around the external hard drive, my computer was on at the time and when I bumped the hard drive, the computer read a blue error message and shut off. Now it wont turn back on. When I press the power button, sometimes a small but very quick orange light will flicker, but that is all. Whats interesting is that the external hard drives still power on when plugged into the computers USB port.
Can you help me? I am happy to buy a replacement part, but I don't want to wast money on a part that works fine.
Kind regards
Peter

Answer Wiki

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It’s a process of elimination. Unplug external devices like drives see if the PC will boot. Does it make any sound or noise at all. You should hear a fan start up at least. A lot of system will make a quick beep or chirp sound shortly after the power on is pressed. If you hear no noises and don’t see any led lights that indicate power or drive activity, I would say the power supply needs to be replaced. Depending on what you system has for components, you may need a larger supply than the one currently in your system.

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  • Subhendu Sen
    You built the computer by your own, this is good. So, hope you have a knowledge of computer hardware parts. Have you opened it BIOS and check if the HDD still shows there? Is there a beeping sound when you start it? Have you tried to change HDD cable (hope it is SATA)? How many RAM slots are there? Is RAM OK? What OS have you loaded there?
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  • bhannah
    Do you have a power supply tester, that will test the power supply outputs from the main power supply. This will test the main output that goes to the bus, and also the rest of power outputs including the USB and Sata drive power supplies.I suspect that you have blown power supply.and this is one of the first things that I would check.
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  • GarySeaSnail
    That makes a lot of sense, but I would have thought if the power supply was broken, that I wouldn't get any power to the external hard drives, which plug directly into the motherboard?

    As for the sound, there is nothing, the computer makes no other signs of life except for the power going to the external hard drives.
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  • GarySeaSnail
    I haven't tried replacing the HDD cord or checked the ram, I did build the computer myself but I don't have spare parts that are compatible to test things. My only other computer has an incompatible motherboard for my 7th generation  intel puu, which is why I'm trying to figure out what part to replace. It's only a year old so parts shouldn't be failing. 

    And I have not opened up the bios to see if the HDD is recognisable, as I believe you need to be able turn on the computer to do this, no?
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  • bhannah
    When a power supply can fail, not all of it will fail at the same time. Certain parts of the power supply can remain active while other parts are dead, and it will continue to supply power to some things on the system board. I have built multiple PC's from scratch and my current one, the case was an HP, The system board and processor are Intel, the Processor is an I5, the memory is PNY with 20 Gigs. The system board will support 32 Gig. It has a WD Blue 1 T HD in it. I am considering adding another mirroring drive to it. I have had equip parts fail out of the box so parts can fail at anytime. And yes, the PC has to be able to turn on to be able to get to the bios. When I built my last system. I and have been highly aware that that most the manufactures under power their system by giving a bare minimum power supply which will not allow you to add anymore parts to yours system without overloading the power supply and then power supply burns out
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  • Subhendu Sen
    See, there are so many ÍF', ÁND' etc. Actually what happens not possible to detect from that side as we are so far. It is better to call someone, who deals with computer systems and ask for help. Probably, there is a minor error, but it is better to check with an expert.
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  • TheRealRaven
    Unfortunately, it's practically impossible to diagnose an electrical hardware problem through an Internet forum. And trying to guide someone in electrical troubleshooting through an Internet forum can be risky and dangerous. Who would want to accept liability?

    Also unfortunately, it could be a fault in the PSU, the motherboard or elsewhere. Vacuuming while the system is not electrically isolated might damage practically any component in the case. Far too many possibilities.

    Also, there may be multiple damages. Perhaps both PSU and motherboard are now dead, along with other components. Components here should probably be unit-tested, removed from the system and tested in isolation. Finding one fault does not mean that other components don't need to be tested.
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