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  • Restart loop

    I dont know if this is a bios problem or a psu problem, the computer works fine when its plugged into the wall with the normal power supply. When i use the m2-atx it posts then instantly restarts, sometimes it gets bad and goes to the "start windows normally" screen, when i wait for the timer to run out and start windows normally it then restarts again. It just sits in this loop indefinitely. Ive read some other posts with similar problems but in their situations the computer randomly restarts, also in others the fan just runs. Im actually getting to post but it restarts before the windows loading screen appears.

    Is this a problem with my M2? Is my bios all goofy? Ideas?

    Thanks

  • #2
    are you changing any hardware other than the power supply?(cd drive, memory, etc?)

    the only time i have seen that is usually with loading the incorrect drivers on the motherboard. it could also be bad memory..

    otherwise, is there any way that you could leave the m2 hooked up to power the computer while loading everything? (if you search around, there are multiple how-to's on powering the m2 outside of the car)
    My OLD 2001 Mitsubishi Eclipse GT:
    "The Project That Never Ended, until it did"


    next project? subaru brz
    carpc undecided

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    • #3
      well i changed the master/save config of the hard drive last night and it booted up just fine with the regular power supply. What do you mean keep the m2 hooked up while loading everything? You mean test it with the m2 indoors on like a bench test?

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      • #4
        yep.

        am thinking that something about the power configuration of the m2 is built differently than the standard atx power supply, and is causing your problem, so by using the m2 to load all the software, the software will account for it.
        My OLD 2001 Mitsubishi Eclipse GT:
        "The Project That Never Ended, until it did"


        next project? subaru brz
        carpc undecided

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        • #5
          ill do some digging and try to find my battery charger and hook it up to the m2-atx, but you think that will yeild different results? It will still be going through the m2 so dont you think it will have the same problem?

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          • #6
            (someone correct me if i am wrong, this is how i have always assumed it) usually computers start loop booting when something in the boot configuration either gets corrupted, or erased, or changed, so it might be possible that something with the m2 is changing the boot configuration just enough to the point that the computer doesn't want to start.
            My OLD 2001 Mitsubishi Eclipse GT:
            "The Project That Never Ended, until it did"


            next project? subaru brz
            carpc undecided

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            • #7
              this happens when a power supply is overloaded..remove some stuff and try to test boot again

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              • #8
                ok I bench tested it and found out a few things, if i disconnect the hard drive from power, (the hard drive is the only other thing drawing power from the m2 besides the motherboard) the computer will boot to where it looks for the hard drive. Of course it cant find it because it is not connected. If i connect the hard drive and try to boot, the screen just goes black and doesnt even try to post. also the ammeter jumps up and down on the battery charger that im using for the bench test. So for some reason the hard drive is throwing everything out of whack. However everything works just fine when i use the powersupply that is plugged into the wall.

                Thoughts?

                I suppose the hard drive could be putting it over the edge, but this an old computer not needing much wattage but i spose it is getting overloaded.

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                • #9
                  the mother board is an EP-8KTA2 and i am using an old *** radeon graphics card because it doesnt have an integrated card. I suppose that the graphics card could be causing it to draw too much power, but it sure is an old weak card...like 1998 old, maybe older

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                  • #10
                    After further playing with the situation i decided to hook up the cd drive instead of the hard drive. WHen i did this the screen just stayed black like it did with the hard drive. The cd drive should be pulling a very very tiny amount of power and still has the same effect. What im thinking is that the timing is off on the m2, it allows the computer to boot fine but when i attach something to those other rails it flips out and gets confused.

                    Anyone have any ideas what is going on or how to fix it?

                    Thanks

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                    • #11
                      Tss tss tss... okay an EP-8KTA2 is a full ATX KT133A athlon (socket A-462) motherboard....
                      that probably draws cpu power from the 5V line

                      And a M2 is rated for 8A Max (peak 12A < 60s) on the 5V...

                      Now let's consider this
                      http://mysite.verizon.net/pchardware...ec_pentium.htm

                      What do we learn there : any cpu stronger than a duron (morgan) 950 will suck dry the 5V rail just for itself.
                      Now Galileo is real. Muhahahahaha :p

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                      • #12
                        thanks for your help, and yes i am a noob...duh thats why im asking

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                        • #13
                          If it sucks dry the 5 volt rail shouldnt there be a drop in voltage? Cause there is none. Also the board is only drawing 5 amps max throughout the whole restarting cycle.

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                          • #14
                            ive put a meter on all of the pins of the m2 and checked it against the original psu. everything is the same except the white wire, on the psu its giving a -5v on the m2 its giving me nothing. Ive read that after 2002 or so the use of that wire was dropped or not necessary. The mother board im using is older than that so it must need it. I supplemented power to that line, -5v while i used the m2 to power the rest of the board and it had no effect. Things are really starting to get frustrating.

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                            • #15
                              Voltage drop, maybe not, but certainly ripples. you checked with an oscilloscope ?

                              Your mobo is aging, so regulators / capacitor may be out of spec, and having hard time to smooth power grid. I don't know the TDP of your graphic card, but it needs power for sure. And kbd, mouse, tsk need 5V.
                              Now Galileo is real. Muhahahahaha :p

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