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    #1

    Asus M2V-TVM frustration

    This had bulging 3300uf 6.3v KZG in VRM output

    Didn't test it first, replaced them with Sanyo WG

    Then tried board - no sign of life

    Reflashed BIOS chip externally - still no sign of life

    Some therapeutic cursing, removed HSF & RAM, to test if Sempron 3000 got warm after power on

    Only mildly so, but then after a few seconds of silent testing, it started getting warmer and "no memory" beeps started

    Replaced HSF & RAM, and it booted up nicely

    Tested, including MemTest86+ and an XP install, without issue

    Left overnight, and you guessed it, next morning dead as a dodo

    More testing without HSF & RAM, no luck this time, then noticed CMOS battery which measured ~2.9v last night, was now ~2.6v

    Put in new battery of ~3.3v and "no memory" beeps straight away

    Then booted fine, and another session of successful testing

    Next day, dead again, and CMOS battery ~2.8v

    Tried another new battery of ~3.2v, no luck

    Put the thing aside before violence started

    Wondering about 1000uf 16v KZG in VRM input ...
    Attached Files
    better to keep quiet and be thought a fool, than to open your mouth and remove all doubt
    Tags: None
    #2
    Re: Asus M2V-TVM frustration

    Originally posted by pfrcom View Post
    This had bulging 3300uf 6.3v KZG in VRM output

    Didn't test it first, replaced them with Sanyo WG

    Then tried board - no sign of life

    Reflashed BIOS chip externally - still no sign of life

    Some therapeutic cursing, removed HSF & RAM, to test if Sempron 3000 got warm after power on

    Only mildly so, but then after a few seconds of silent testing, it started getting warmer and "no memory" beeps started

    Replaced HSF & RAM, and it booted up nicely

    Tested, including MemTest86+ and an XP install, without issue

    Left overnight, and you guessed it, next morning dead as a dodo

    More testing without HSF & RAM, no luck this time, then noticed CMOS battery which measured ~2.9v last night, was now ~2.6v

    Put in new battery of ~3.3v and "no memory" beeps straight away

    Then booted fine, and another session of successful testing

    Next day, dead again, and CMOS battery ~2.8v

    Tried another new battery of ~3.2v, no luck

    Put the thing aside before violence started

    Wondering about 1000uf 16v KZG in VRM input ...
    Does it crash when left on?
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    Comment

      #3
      Re: Asus M2V-TVM frustration

      Originally posted by RJARRRPCGP View Post
      Does it crash when left on?
      Rock solid stable

      This morning it started straight away, although had lost CMOS settings - and battery of ~2.8v which I hot-swapped in last night while testing, was still ~2.8v

      Don't forget, it's Winter here in southern hemisphere, and while unheated garage/workshop/playpen may not get cold by northern hemisphere standards, it's still pretty chilly

      Hot-swapped in another CMOS battery of ~2.9v which retained settings through a brief power-off, and going to replace Sempron 3000 with Athlon X2 3600 to see how it goes

      I quite like Via-powered stuff, compared to nVidia s**t
      better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

      Comment

        #4
        Re: Asus M2V-TVM frustration

        Almost certainly a northbridge which needs to be re-balled or reflowed.
        "We have offered them (the Arabs) a sensible way for so many years. But no, they wanted to fight. Fine! We gave them technology, the latest, the kind even Vietnam didn't have. They had double superiority in tanks and aircraft, triple in artillery, and in air defense and anti-tank weapons they had absolute supremacy. And what? Once again they were beaten. Once again they scrammed [sic]. Once again they screamed for us to come save them. Sadat woke me up in the middle of the night twice over the phone, 'Save me!' He demanded to send Soviet troops, and immediately! No! We are not going to fight for them."

        -Leonid Brezhnev (On the Yom Kippur War)

        Comment

          #5
          Re: Asus M2V-TVM frustration

          Yeah. Take off the heatsink and reflow the VIA northbridge. Careful on the temps though, they're sensitive.
          Originally posted by PeteS in CA
          Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
          A working TV? How boring!

          Comment

            #6
            Re: Asus M2V-TVM frustration

            Here's a pic before my first attempt, with a bit of aluminium angle shielding the capacitors

            The stuff around the northbridge is Amtech Syntech-TF - hopefully genuine, although from eBay, it was a vendor in Connecticut USA

            I've had two goes at it - first with hot air station set at 320c, second at 350c, both times fairly slow air flow

            Neither very successful - thinking once more at 370c, before it meets the garbage tin
            Attached Files
            Last edited by pfrcom; 07-28-2015, 08:17 PM.
            better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

            Comment

              #7
              Re: Asus M2V-TVM frustration

              Maybe third time lucky

              I tried another reflow yesterday at 370c, after which it booted immediately

              Left overnight, this morning it booted straight away again - with CMOS settings retained, and battery not discharged

              Tested a clean install of XP without problems, it's now run Aida64 System Stability Test for ~2 hours

              My thanks to mockingbird and Th3_uN1Qu3
              Last edited by pfrcom; 07-31-2015, 12:00 AM.
              better to keep quiet and be thought a fool, than to open your mouth and remove all doubt

              Comment

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