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Recalcitrant A8V Deluxe

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    #1

    Recalcitrant A8V Deluxe

    Testing this board on a wooden surface, sometimes it will start the power supply when I short PWR & Ground on its System Panel block, and sometimes it won't

    For a given session, if it starts it'll continue to start after a power off, but if it won't start nothing I can do will persuade it to start (including a change of power supply)

    During one of its cooperative phases I discovered that its LAN, although detected by an O/S, would freeze up the session if enabled in BIOS

    This applied to both Windows XP & descendents, and Linux - not a driver issue, same setup worked nicely with another, pleasant, A8V Deluxe

    Any suggestions ? - I'm tempted to try removing its LAN chip
    better to keep quiet and be thought a fool, than to open your mouth and remove all doubt
    Tags: None
    #2
    Re: Recalcitrant A8V Deluxe

    ^
    I'd say give that a go. I've fixed a couple of boards which were refusing to power up that way (including the board in my current main PC)
    I love putting bad caps and flat batteries in fire and watching them explode!!

    No wonder it doesn't work! You installed the jumper wires backwards

    Main PC: Core i7 3770K 3.5GHz, Gigabyte GA-Z77M-D3H-MVP, 8GB Kingston HyperX DDR3 1600, 240GB Intel 335 Series SSD, 750GB WD HDD, Sony Optiarc DVD RW, Palit nVidia GTX660 Ti, CoolerMaster N200 Case, Delta DPS-600MB 600W PSU, Hauppauge TV Tuner, Windows 7 Home Premium

    Office PC: HP ProLiant ML150 G3, 2x Xeon E5335 2GHz, 4GB DDR2 RAM, 120GB Intel 530 SSD, 2x 250GB HDD, 2x 450GB 15K SAS HDD in RAID 1, 1x 2TB HDD, nVidia 8400GS, Delta DPS-650BB 650W PSU, Windows 7 Pro

    Comment

      #3
      Re: Recalcitrant A8V Deluxe

      change the battery before anything else.

      Comment

        #4
        Re: Recalcitrant A8V Deluxe

        I changed its battery before starting on this board

        Have been trying it with my refurbished Antec Truepower 2.0 480W https://www.badcaps.net/forum/showthread.php?t=37794

        Worked fine for a couple of days, then turned nasty again this morning - wouldn't start the power supply - and its LAN chip was slightly warm to the touch, compared to others like South Bridge which were stone cold

        LAN amputation coming up soon
        better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

        Comment

          #5
          Re: Recalcitrant A8V Deluxe

          LAN chip removed

          Expected to see LAN options gone from BIOS, but they're still there

          However, even though LAN is enabled in BIOS, WinXP shows no network connection, so the freezing issue is gone

          What isn't gone is erratic starting

          I thought non-starting had gone constant, and put the board aside with a CMOS battery having ~3V some weeks ago

          Picking up on it again, it started, albeit with the battery drained to ~0.5V

          So I put another battery of ~3V in it, and now the damn thing wont start again

          BTW, I'm not wasting CR2032 batteries - have one soldered to a CR123 no longer effective in my flashlight

          I recall someone here fixing a problem with CMOS batteries being drained, by replacing a transistor or FET that was stuck open

          Can't find that thread, but if that person reads this, could you please pass some expertise my way
          better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

          Comment

            #6
            Re: Recalcitrant A8V Deluxe

            Well I put the ~0.5V battery back in, and it still wouldn't start

            Tried different power supplies - no go

            It's now sat for a couple of days, still no go

            Seems like whatever electronic switch is activated by momentarily shorting PWR & Ground pins, is stuck open

            How do I track this down ?
            better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

            Comment

              #7
              Re: Recalcitrant A8V Deluxe

              follow the track rfom the battery + terminal to find the diode(s)

              Comment

                #8
                Re: Recalcitrant A8V Deluxe

                Originally posted by pfrcom View Post
                Well I put the ~0.5V battery back in, and it still wouldn't start

                Tried different power supplies - no go

                It's now sat for a couple of days, still no go

                Seems like whatever electronic switch is activated by momentarily shorting PWR & Ground pins, is stuck open

                How do I track this down ?
                There's some black magic going on with ASUS boards.....I've had this happen too with my P4P800-VM,and until I dissasembled and assembled the PC back I had to power it the AT/XT way,by wiring a rocker switch to PS_ON and a GND.

                Give this option a shot,at least I had success powering on my board this way,and it POSTed.
                Last edited by Dan81; 08-06-2014, 10:23 AM.
                Main rig:
                Gigabyte B75M-D3H
                Core i5-3470 3.60GHz
                Gigabyte Geforce GTX650 1GB GDDR5
                16GB DDR3-1600
                Samsung SH-224AB DVD-RW
                FSP Bluestorm II 500W (recapped)
                120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
                Delux MG760 case

                Comment

                  #9
                  Re: Recalcitrant A8V Deluxe

                  Originally posted by Dan81 View Post
                  power it the AT/XT way,by wiring a rocker switch to PS_ON and a GND.

                  Give this option a shot,at least I had success powering on my board this way,and it POSTed.
                  Not an option with this board - when it's having one of its tantrums, if I turn power off at wall, jumper PWR & Ground, then turn power on, it still won't start
                  better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

                  Comment

                    #10
                    Re: Recalcitrant A8V Deluxe

                    Originally posted by pfrcom View Post
                    Not an option with this board - when it's having one of its tantrums, if I turn power off at wall, jumper PWR & Ground, then turn power on, it still won't start
                    I meant doing the ATX jumpstart on the board using a rocker switch.

                    Kinda like in this video,except you're supposed to turn it off through the rocker switch instead of front panel:
                    https://www.youtube.com/watch?v=nYb7UaWip8w
                    Last edited by Dan81; 08-08-2014, 12:16 AM.
                    Main rig:
                    Gigabyte B75M-D3H
                    Core i5-3470 3.60GHz
                    Gigabyte Geforce GTX650 1GB GDDR5
                    16GB DDR3-1600
                    Samsung SH-224AB DVD-RW
                    FSP Bluestorm II 500W (recapped)
                    120GB ADATA + 2x Seagate Barracuda ES.2 ST31000340NS 1TB
                    Delux MG760 case

                    Comment

                      #11
                      Re: Recalcitrant A8V Deluxe

                      I think I have a similar problem with my ASUS CUR-DLS - sometimes it will boot fine, other times when I press the power button, the power LED turns ON, but then as soon as I release the power button, the motherboard turns OFF. Those are the cases where I have to press and hold the power button for a few seconds and then the motherboard might just turn ON. I have no idea what ASUS is doing with their motherboards, but I was never a fan of their designs.
                      Last edited by momaka; 08-10-2014, 05:59 PM.

                      Comment

                        #12
                        Re: Recalcitrant A8V Deluxe

                        Last thing I did back in August, was put a CMOS battery having ~3V into it, but still couldn't get the thing to start, no matter how much cursing I used

                        So I left it until now, and it's again drained the CMOS battery but started without an issue

                        I replaced the CMOS battery and let it sit overnight, thinking it'd have a tantrum in the morning - but no, it still started without a problem

                        Originally posted by pfrcom View Post
                        I recall someone here fixing a problem with CMOS batteries being drained, by replacing a transistor or FET that was stuck open

                        Can't find that thread, but if that person reads this, could you please pass some expertise my way
                        better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

                        Comment

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