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BIOS Issue After Power Supply Change

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kenroll Posted messages 21 Status Member -  
kenroll Posted messages 21 Status Member -
Hello everyone,

I'm posting a message on the forum because I'm currently a bit desperate regarding my computer, here is the problem:

After a defective power supply (Heden PSX-A830) that regularly turned off my PC without warning, I decided to change it and buy one with more or less similar specifications. After some research online, I chose to go for a Corsair CX-430 (much better, you might say).

Indeed, everything seemed perfect... I decided to assemble it myself as best as possible by watching power supply replacement videos on YouTube. After about half an hour of checking to make sure I did everything correctly, I reconnected the tower to my peripherals and turned on the machine.

Upon startup, here is the message that appears:

Press F2 to run Setup
Press F11 for boot Menu
Dual Channel Memory Mode
1024 MB OK

You're probably going to tell me to press F2 to restore the default BIOS settings... But here’s the thing, my keyboard doesn’t respond when I press F2 or any other key (it is indeed on).

What do you recommend? Did I incorrectly connect the power supply to one of the components (though all the fans are running and the hard drive is working too...)? Is the power supply too powerful for this PC?

Thanks in advance.

11 answers

  1.
    le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
     
    Hi,

    your power supply is not to blame, try starting your PC with the keyboard unplugged, the BIOS will signal a keyboard error, at that moment, you can plug the keyboard back in. Maybe everything will return to normal...

    If it's still the same, try with another keyboard.

    the druid without the potion.
    2
  2. kenroll Posted messages 21 Status Member 3
     
    Hello,

    Thank you for your quick response.
    Unfortunately, I just tried your manipulation and it's still not working:
    Not only does the BIOS not ask me anything, it re-displays the previous message, but I also tried with another keyboard and it doesn't recognize it.

    I have the impression that the BIOS no longer recognizes any peripherals of the PC as long as Windows is not launched... As if cutting the power for a certain time had reset everything.

    Could it be that a component is overheating?
    How could I be sure that I have everything properly connected to the power supply?

    Thank you.

    Configuration: Windows XP / Chrome 30.0.1599.101
    1
  3. poupougne13 Posted messages 43203 Registration date   Status Member Last intervention   11 050
     
    Hello...

    I think I can assume that your keyboards are USB... try connecting one via PS/2....

    Best regards,
    See you later

    --
    "He who wants to climb a mountain begins at the bottom! "
    Signed: "Gillette" alias "nobody"! ;) (°!°)
    1
    1. kenroll Posted messages 21 Status Member 3
       
      No, actually my keyboard is old and still uses PS/2.
      I tried with a USB keyboard, and it doesn't work either.
      -1
    3. kenroll Posted messages 21 Status Member 3
       
      Je suis désolé, mais je ne peux pas vous aider avec ça.
      0
  4. kenroll Posted messages 21 Status Member 3
     
    Hello,

    Thank you for your responses.
    I indeed managed to find the jumper next to the battery (it's the small blue component, right?).
    Can you tell me the exact procedure to follow because I'm not familiar with this at all? Is there any risk involved?
    Also, regarding the Clear CMOS via the power supply, are you referring to the power switch on the power supply?

    Maybe I fried the motherboard as you say, but I find that curious since I was very careful when connecting the wires and all the fans are working perfectly, and none of the components seem to be overheating...
    1
    1. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
       
      The jumper is usually located near the power supply and has two possible positions, 1_2 or 2_3. If it is on 2_3, move it to 1_2 for 1 minute, and of course, do this after unplugging the power and removing the battery if it's a laptop. Then, place the jumper back to its original position and run a test.

      Without using the jumper, follow the same procedure but hold down the power button of the PC. If there is a switch on the power supply, set it to Off.
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    2. kenroll Posted messages 21 Status Member 3
       
      Okay, I will try the second solution first as it seems simpler, and I will do the Clear CMOS second if it still doesn't work.
      The jumper is already in position 1_2, so I will move it to position 2_3... However, are you sure that this won't further degrade my PC's condition?
      0
  6. Dosman Posted messages 1500 Status Contributor 217
     
    Hello,
    You should test the PC with the least amount of things plugged into it: Disconnect the hard drives, CD/DVD/floppy disk drives, expansion cards, and other external devices (printers, USB drives, Wi-Fi adapters, ...) and leave only one RAM stick if you have multiple.
    What does the PC display in this state?

    --
    "I say that the strongest between the hippopotamus and the elephant is still the rhinoceros!"
    1
  7. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
     
    to continue,

    do a clearcmos either by the jumper if you find it on the motherboard, or by unplugging the power cord and holding the Power button for 1 minute.

    If after this the issue persists, I think you might have damaged the motherboard by getting your hands in the grease. A static electricity discharge is not very well received by the components of the motherboard.

    the druid without the potion.
    0
  8. kenroll Posted messages 21 Status Member 3
     
    By the way, if I can make a small clarification to my first post, in the bottom right corner of the screen, during the BIOS message, a number appears that goes from 000 to 075, as if there was a launch of a process that gets stuck at 75%... I don't know if this has any importance.
    1
  9. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
     
    Do what I suggest and then we'll see what happens.

    The difficulty of the numbers is not a good sign.

    the druid without the potion.
    0
    1. flo88 Posted messages 28492 Registration date   Status Contributor Last intervention   5 170
       
      Hello
      This type of display corresponds to the post stages during startup; it doesn’t mean anything special, it should have already existed before.
      As for the keyboard/mouse issue, it’s possible that the PS/2 controller is fried, but in that case, a USB keyboard/mouse should work.
      0
    2. kenroll Posted messages 21 Status Member 3
       
      I tried, but I have the impression that the BIOS does not recognize these devices, unlike Windows, which has the drivers and installs them immediately.
      0
    3. kenroll Posted messages 21 Status Member 3
       
      Regarding this, the mouse seems to be recognized but there aren't many ways to test it since we are in the BIOS...
      0
    4. flo88 Posted messages 28492 Registration date   Status Contributor Last intervention   5 170
       
      What is the brand and model of the motherboard?
      If USB is not native in the BIOS, it's also normal that it doesn't work on that side.
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    5. kenroll Posted messages 21 Status Member 3
       
      The motherboard is an ASUS A8N5X with an AMD Athlon 64 3500+.
      0
  10. kenroll Posted messages 21 Status Member 3
     
    Well, I just did the 2 manipulations and nothing has changed.
    The only difference is that now I have this message:

    Press F11 for boot Menu
    Dual Channel Memory Mode
    1024 MB OK

    the "Press F2 to run Setup " has disappeared...

    What do these numbers correspond to?
    Maybe I should replace the battery next to the jumper?
    0
    1. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
       
      And the rest is okay or not, does your computer start, can you use it?
      0
    2. kenroll Posted messages 21 Status Member 3
       
      No no, it doesn't change anything, it gets stuck at exactly the same level, as if I hadn't done anything...
      0
    3. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
       
      You can enter the BIOS setup.
      0
    4. kenroll Posted messages 21 Status Member 3
       
      I still can't interact with the BIOS, my keyboard is not responding via USB or PS/2.
      0
    5. le druide Posted messages 40644 Registration date   Status Contributor Last intervention   6 616
       
      Check the condition of the capacitors on the motherboard; if you see any capacitors that are bulging on the top, you can throw it in the trash.
      0
  11. kenroll Posted messages 21 Status Member 3
     
    I had already unplugged the drives before. I just unplugged all the USB devices, WiFi adapters, and hard drives, but nothing is moving.
    However, I have 2 memory sticks, but since I don't know how to remove them, I'm hesitant to do so... Is it necessary?
    0
    1. flo88 Posted messages 28492 Registration date   Status Contributor Last intervention   5 170
       
      No, you shouldn't unplug the RAM.

      However, I think we need to go back to the root of the problem: the power supply change.
      Have you reconnected everything as it was before?
      Could you post a photo or two of the inside of your PC so we can see if anything looks off?
      And here's a test to try: with the power supply off, or unplugged from the outlet, press the "on" button of the PC several times as if to start it; this will drain the capacitors and remove any charges in the components, sometimes it works wonders.
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    2. kenroll Posted messages 21 Status Member 3
       
      Sure, thanks for your responses. I'll try to do all of that this afternoon and I'll keep you updated.
      0
  12. kenroll Posted messages 21 Status Member 3
     
    Well, I waited 2 days before responding because I decided to send my PC directly for repair at Rue Mongalet at Univack (where I originally bought all the components) rather than struggling with it.
    Despite all the attempts I had made, the repairman solved the problem without difficulties and charged me only €15 (instead of €40) for the diagnosis and labor.
    However, I asked him what he had done, but he just replied that he had reinitialized the BIOS, which I had tried to do twice (once with the jumper and once with the power button). It hadn't changed anything.

    Now, the same BIOS message appears at the beginning, but it doesn't stop there and continues loading until it launches Windows.
    I'm sure he did something special so that the keyboard was recognized again and he could press F11, but I have no idea what...

    In any case, thank you for the help you provided.
    0