Motherboard dead?

By HillTech · 21 replies
Nov 19, 2004
  1. My boss asked me to upgrade his son's CPU. It would never start. I checked the battery, the power supply, memory chips, and the cables. I finally pulled the 2 HD's hooked them to another computer and upgraded the OS. I put them back in the original CPU, nothing. The fans come on and I have a light, but there is no attempt to boot the HD at all. Would this mean the mother board is toast? I've replaced one other MB, but that was years ago when I was working for the school. I am limited on tools I have now. Is there anything else I should try?

  2. AtK SpAdE

    AtK SpAdE TechSpot Chancellor Posts: 1,495

    I need a little more info...when you say a fan comes on, do you mean the Power Supply fan, or the CPU fan? Same thing with the light which light?
  3. Richykins

    Richykins TS Rookie

    Also - if you can provide the m/board make a number - that might help. Do you get any POST beeps from the BIOS?

    I've had something similar quite recently...
  4. AtK SpAdE

    AtK SpAdE TechSpot Chancellor Posts: 1,495

    Just in case you dont get a beep code, and its a Dell, look on the back of the case for a set of blinking lights (instead of a speaker on some dell mobos, they have little lights that give out a code)
  5. FlyingAce

    FlyingAce TS Rookie

    Try resetting the CMOS to default - sometimes there's a jumper on the MB for this or you can just pull out the battery and put it back in. I had a very similar problem, and I did this out of desperation. I thought I had f* everything up, but the bios had just gotten confused.

    Good Luck.
  6. Ya that very well could be it.
  7. HillTech

    HillTech TS Rookie Topic Starter

    Fans on Motherboard

    The fans that I speak of are the following:

    Power Supply
    Fan on the Motherboard
    Fan on Video Card
    2 extra fans that have been installed for cooling. One is mounted to the back of the CPU and the other is in a slot. These connect together and then to the power supply.

    The light that comes on is a LED 1 light.

    Does this help? I would have thought if it can run the fans, there may be hope...
  8. redeyemindtrick

    redeyemindtrick TS Rookie

    are you getting any video at all?sounds like the board is working, does it have integrated video? check the vid card. systematically test each component if you can until you find the problem. not to jump the gun, but it sounds to me like it could be a video problem
  9. HillTech

    HillTech TS Rookie Topic Starter

    I get nothing. I don't even hear the hard drives churning. I just get fans and the LED light.
  10. HillTech

    HillTech TS Rookie Topic Starter

    Now I lost the fans

    But the LED light still comes on. :dead: Any ideas?

    Thank you!

  11. redeyemindtrick

    redeyemindtrick TS Rookie

    what kind of computer is it? what are some of the specs? what size memory module did you put in it? if you put in say 256mb in 1 slot, and the mother board only supports 128mb per slot, then you you will get similar if not the same results that you are getting. take off the side cover and look at the board, it should say somewhere on it what it is
  12. HillTech

    HillTech TS Rookie Topic Starter

    Lost the fans, LED still on.

    The MB is a ASUS A7A266 Mother Board. The memory is 128 (2 of them). Cannot figure out why the fans died... I am beginning to hate this thing...

    Processor Socket A for AMD® Athlon™ / Duron™ 550MHz ~ 1GHz+ CPU
    Chipset ALi® M1647 266MHz FSB chipset with ALi® 1535D+ South Bridge
    FSB 266/200MHz Front Side Bus
    Memory 2 x DDR DIMM Sockets
    Max. 2GB PC2100/PC1600 DDR SDRAM
    3 x SDRAM DIMM Sockets
    Max. 3GB PC133 SDRAM
    Expansion Slots 1 x AGP Pro/AGP 4X
    4 x PCI
    1 x PCI/AMR Shared
    VGA AGP Pro/4X/2X/1X Slot
    IDE Ports 2 x UltraDMA/100
    Audio (Optional) C-Media CMI-8738 PCI Audio Controller
    4-Channel Speaker Mode
    LAN (Optional) 3Com® 3C920 100/10Mbps LAN Controller
    Special Features Power Loss Recovery, ASUS® JumperFree™, CPU Throttle, SFS (Stepless Frequency Selection)
    Back Panel I/O Ports 2 USB
    1 Parallel
    2 Serial
    1 PS/2 Keyboard
    1 PS/2 Mouse
    1 Audio I/O (Optional)
    1 Game/MIDI (Optional)
    Onboard I/O Interface Two Headers Supports Additional 4 USB Ports
    20-pin ASUS Panel
    ASUS® iPanel Connectors
    SIR (Integrated Serial Infrared)
    Headphone (Optional)
    MIC (Optional)
    CD /AUX /Modem Audio In (Optional)
    CPU /Power Supply /Chassis Fan
    ATX Power
  13. redeyemindtrick

    redeyemindtrick TS Rookie

    hmmm....dont sound good,sounds like the board is toast, sounds like it was getting some power, but if the board is out, it's very likely that the power is only getting far enough to light that led. might be in the circuitry why the cuurent isn't getting to the ide slots and such. take a second look at the power supply before you rule it out
  14. Samstoned

    Samstoned TechSpot Paladin Posts: 1,018

    at this point given your time in it may be better to buy nother cheap MB
    I played around to much with a abit board looked at it close and it had bad capacitors on it .
    I give 2 hours to a board now, thats it (unless of course its a dual server)
    out it goes.
  15. HillTech

    HillTech TS Rookie Topic Starter

    I agree

    I looked up on E-bay and gave the specs to my boss as it is his credit card.

    What fun!!!

    Thanks everyone for the help and input. I had NEVER had it happen this way before!
  16. reallyconfused

    reallyconfused TS Rookie

    I read this read as I have almost an identical problem - but my harddrive is getting power - I hear and feel the drive humming.

    Just like HillTech, I tried BIOS jumper reset, even put a new battery, but no beeping and nothing on the monitor. Could be the board but could it be the CPU?

    Redeyemindtrick and Samstoned, any ideas???

    Thanks in advance.
  17. redeyemindtrick

    redeyemindtrick TS Rookie

    what exactly is it doing when you try to power it up? is everything appear to be running, i.e, fans, power supply, cpu fan, vid card fan if equipped? make sure the cmos jumper is on the correct pins. are you just getting no video or no power. if the ram stick is not supported then you would get no video, or if the processor was not working you wouldnt get video. what size power supply does it have in it? sorry if i seem to be running in circles, have you tried a different power supply? :giddy:
  18. Kefuddle

    Kefuddle TS Rookie

    I had exactly the same Symptoms. In my case, by deductive reasoning I nailed it down to my power supply becoming faulty and overpowering a component on the motherboard. This obviously required both a new power supply and motherboard :(
  19. bakkerrich1979

    bakkerrich1979 TS Rookie

    same here

    i recently built a pc with brand new parts from scratch. The computer ran flawlessly for a few weeks. Then mysteriously it died and i experienced exactly the same symptoms. After extensive research and experimentation, i found that the mobo (motherboard) is dead. The lights come on, all the fans spin, but black screen. I replaced the cpu but no luck. Tested the ram, removed the videocard, hd, and removed the mobo from the case. I created a basic setup ontop of a box with one stick of corsair 2 gig ram utilizing onboard graphics and a brand new cpu. Still no luck. I then tested the power supply with a miltimeter seeing as cables are color coded, black being ground and yellow and red being 6 and 12 Volt DC power supply. The power supply checked out no problem, so logical deduction lead me to believe its the motherboard. The motherboard was an ASUS CROSSHAIR SLI GAMING of the line with LCD POSTER. The LCD poster simply says CPU init...wich is doesnt even give an error code to look up. What went wrong....who knows....I didnt overheat the board because it was mounted in an very well ventilated case with many fans. It wasnt the power supply because its 850 watt and it checked out....the supply is voltage fluctuation even under extreme testing.


    My next MOBO will be GIGABYTE OR MSI. I sincerely hope that this advice will save one person the headache i endured.
  20. AtK SpAdE

    AtK SpAdE TechSpot Chancellor Posts: 1,495

    So you got a bad board, I am sure that could never happen with MSI or Gigabyte :rolleyes:
  21. Ciiba

    Ciiba TS Rookie

    resetting the CMOS should not work, it seem not caused by CMOS.
  22. bakkerrich1979

    bakkerrich1979 TS Rookie

    i agree

    I realize that I am not being fair and impartial, but it totally kills your enthusiasm when you pay alot of cash for parts that die after a few weeks.
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