Problem after assembling my PC parts

Discussion in 'Hardware Discussion & Support' started by sohaieb, Jan 29, 2021.

  1. sohaieb

    sohaieb New Member

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    Hello everyone,

    I have an Asus Desktop G11CD-K PC (the K is for Kabylake version) wich i disassembled to clean all its parts (including Graphic card fan, its Processor, CPU fan and replacing its thermal paste, and also its front components).

    After cleaning, I assembled it correctly, but to be honest i did not think that i used all the right screws, but i chose it by its placeholder form and place.

    When i turned on my PC, i found that CPU-fan, Graphic-Fan, PSU and HDD worked well, but all other parts did not work, like back-fan, all USB peripherics etc..

    I tried all possibilities:
    1. disassembling and re-assembling again, changing RAM to different slots, removing some parts step by step to see if something can make a change, make my motherboard out of the case and turn it on to see if there is a problem with case-contact or anything else. but nothing was working for me.
    2. I reset my CMOS too, but the issue still existing.
    3. finally, i plugged-in my usb mouse and/or my usb keyboard, i see that some diodes of these two components lights for a while (a fraction of seconds) then it turned off again so that i understand there is a contact but i don't know what is the problem again.
    4. After these tests, i used my multimeter to see if current values are right, and yes my PSU worked well with the right voltage values in all its pins (motherboard pins, cpu pins and gpu pins).
    I don't know what happen because i'm really sure that i did not do something wrong or risky, and i did never use my force to disassemble or assemble components.

    A little things to mention:
    • I remember that i cleaned my CPU with an electronic liquid (see picture below ), but at this point i did not turn-on my PC directly, i just waited for several minutes (approximately 40 minutes), also i read carefully its notices but they mentioned that i can use it on motherboards and all electronic cards. Can this be a cause of this kind of problems? if it is, so could that damage my motherboard ? if yes, how graphic card fan works then?
    Please help me.

    thanks
    Electronic cleaner liquid:
    IMG20210125204553_k.jpg IMG20210125204559_k.jpg
     
  2. Judas

    Judas Obvious Closet Brony Pony

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    There is a chance depending on the type of electronic cleaner that you could of damaged components as some contact cleaners can strip away as well as leave residue. Electronic cleaner is mostly for industrial component cleaning where dirt and grease is a thing with PCBs with large components and traces, not something as delicate and small as modern computer hardware.

    At most i'd use pure 99% alcohol and swab if i needed to. It could be a fluke of something but honestly anything could be wrong considering you disassembled something entirely for cleaning and don't seem entirely certain you got it all back together right. You could have a short somewhere or something plugged in wrong or a something jammed in somewhere it doesn't belong.
     
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  3. sohaieb

    sohaieb New Member

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    Hello ,
    first i thank you for your reply,
    i want to mention, that it is wrote in front of the cleaner "it can be used on electronic boards, computers and electronic devices" but i'm not sure about it can residue or not,
    about assembling, i'm sure i assembled it in the right way, but i was not sure only about screws, but after trying disassemble/assemble another times i got it in the right places.
    I did mobo tests without uncessary components (i plugged-out HDD, GPU, with and without RAM and any other USB perepherals) and the problem still as it is..
    about shorts: yes it maybe and maybe not too , because some parts still working but other not ..
    I will try to re-test every component apart, and i hope i can find something new ..
    i will give feedback if there is some changes
    thanks
     
  4. Judas

    Judas Obvious Closet Brony Pony

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    There are always asterisks involved with the "safe to use on"... It's never all encompassing for lots of products.

    There isn't much we can do here for suggestions other than trail and error at every step.

    I will say in the future, use canned compressed air to blow things out.. and at most 99% alcohol for the intended application for only the parts that need it (usually limited to cleaning up thermal paste only)
     
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  5. sohaieb

    sohaieb New Member

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    Hello,
    Thanks for your reply again,
    The problem that in my country i could not find a compressed air, so i was obligated to use that kind of cleaners ..
    Here is new steps i did today:
    1. I re-disassembled again all parts.
    2. I used this product WD-40 contact cleaner to re-clean all parts wich i cleaned before including: CPU, CPU Fan, Back-fan, GPU and the MOBO , to remove all resedues from the first cleaner i used before.
    3. I tested all my PSU contacts with this ATX PSU tester and it gave me the correct voltage values (except the -5 V because i think it's optional, and because there is no white pin installed on it too).
    4. I tested my back-fan wich was not working on the MOBO, but it worked with a 9V battery out of the mobo (here I have a new question: If the back-fan did not work on the MOBO, it can because of the mobo it self or because the CPU ?)
    5. I tested again with RAM in different slots, with the iGPU and also with the PCI-GPU, but the problem still existing.
    6. Finally, I think my problem is between damaged CPU and/or damaged MOBO, So what do you think?
    If there are no suggestions, I will maybe try to contact ASUS support for my issue.
    thank you again
     
    Last edited: Feb 7, 2021
  6. Trusteft

    Trusteft HH's Asteroids' Dominator

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    First of all, outside of 90% + alcohol, I never heard anyone using any other type of liquid to clean a modern computer internals . Perhaps it's just me.
    Air would be fine too.
    ANYWAY,
    first of all are you 100% certain you have plugged everything in that should be plugged and in the right slots? Double and triple check.

    Try to run with only one RAM stick. If the problem repeats, try different stick on different slot.

    If that doesn't help, if you can go to BIOS, do so and set it to default settings.
     
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  7. Dyre Straits

    Dyre Straits 10 Grandkids -2 Great-grandsons

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    In the event that canned compressed air is not available, if you have any kind of vacuum cleaner with a hose attachment, I would advise that you connect the hose to the OUTLET on the machine, use the small end attachment and blow the dust and debris from inside the case without touching any of the components.

    Most vacuum cleaners come with a way to attach to the outlet port.
     
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  8. Judas

    Judas Obvious Closet Brony Pony

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    i have a suspicion that the contact cleaner being used as it is, is likely the cause of the problem. If there was any debris built up, and it got into any slots as a muddy mess, chances are it could have caused a short.

    If i was going to do anything with liquid, i'd simply pull all the plastic and heatsinks off the mainboard/gpu and stick them in the dishwasher without any soap... straight hot water wash.

    The only other thing is potential damage done while reconnecting it provided everything is indeed hooked up right. One slip of the screwdriver or one scrape putting something in the case is all it takes to bugger something up.
     
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  9. sohaieb

    sohaieb New Member

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    Hello,
    what about this cleaner WD-40? I saw many specialists use it ..

    I already did that and I mentioned these steps (note: that i have no access to bios neither monitor).

    There is something i did not mention before: is that when i cleaned my motherboard, i think i forgot my cmos battery plugged-into the mobo , so can this be a cause for a short of something?
    Hello again,
    I will check this step, i hope i can find a vaccum here ..
    thank you

    Hello,
    I checked all parts and corners with a magnifying glass to verify if there is something can cause any problem, but my mobo was really cleaned correctly .. my doubt is still between the cleaner itself and my fault about forgetting the CMOS battery plugged-in ..
     
  10. sohaieb

    sohaieb New Member

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    Hello everybody again,

    I’m really sorry for my late answer, because i was waiting for some bought components (my new case , new MSI motherboard and different tools for PC Building).

    I’m really happy to say that i finally solved my problem by re-building all my pc using the old parts (except the prebuilt case and the old ASUS mobo),

    now my PC works well with my new build, so that i confirm that the problem was only because of the fried mobo.

    Fortunately, none of my other components was damaged :D , so I used it in my new case :))

    This is my first PC diagnostic & building experience, so i’m really happy to learn something new and I thank you all because i learnt a lot from all of you :)

    here is pictures of my new build:
    IMG20210306144444.jpg IMG20210306144452.jpg IMG20210306180314.jpg
     
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  11. Trusteft

    Trusteft HH's Asteroids' Dominator

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    Nice!
     
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