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  • SNES Repair

    Hello all,

    First post on the forum! I initially joined up because im planning to build a mame box yet here I am posting about repairing an old SNES i decided to dust off and play.

    I recently tried playing my old SNES and the two games I tried had scrambled graphics. In Mortal Kombat i could see the background but not the sprited. In Mario all stars I could only see the sprite and no background. I gave both a clean with isopropyl without much luck. I also tried cleaning the SNES cartridge. I've been reading that it could be the PPU?

    I also have a Super UFO Pro 7 that isnt displaying. Not sure if its the snes or this unit. When i plug in the power adaptor it makes a short noise then stops. The floppy LED doesnt light up either.

    I've google repairers in Melbourne but havent had much luck. I'd repair it myself but my soldering skills are absolutely rubbish and given his was my first console I'd prefer not to destroy it for good! If theres anyone here who can point me in the right direction that would be great.

    Cheers,
    Trev

  • #2
    Could be any number of things, but if it's been stored for a bit you may have gunk built up below the cartridge connector that'll need to be cleaned out. First up, get the system opened up, and remove all the screws from the RF shielding and on either side of the cartridge connector.

    First, check the version number in the bottom-right of the board and see what it is. If it says 1CHIP, then what I'm going to suggest won't be possible:
    Click image for larger version

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    If it's not a 1CHIP, take a look at the bit I've circled in red below. The top half of the cartridge connector can be removed on the non-1CHIP versions of the SNES fairly easily, so give it a bit of a wiggle & upward force and it'll pop off.
    Click image for larger version

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    Once you've got it off, use a toothbrush soaked in isopropyl to scrub all the pins on both sides of the connector fairly well. once you've hit all the exposed bits of the cartridge connector and it's dried, replace the top-half of it and test a game to see if it's improved any. If not, take a look at my thread on Twitter from a while back when I fixed some graphical issues being caused by corroded traces & check the areas I mention - https://twitter.com/i/moments/828409682972663808

    Good luck!

    Comment


    • #3
      Great tip. Thanks alot! I can manage dismantling and reassembling more than soldering so lools like I have something to do this weekend.

      Comment


      • #4
        Hi poora

        How did you go with this one? From my experience a good cartridge and cartridge slot clean will do the trick but if you do discover it has corroded traces I’d be happy to help with soldering.

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        • #5
          Hey Rustler. I ended up having to order the tool and havent got around to it. I hit up a retro console repairer just incase it doesn't work. I'm hoping to take it apart this week and will take some pics while im at it.

          Comment


          • #6
            Originally posted by poora View Post
            Hey Rustler. I ended up having to order the tool and havent got around to it. I hit up a retro console repairer just incase it doesn't work. I'm hoping to take it apart this week and will take some pics while im at it.
            Opened it up and gave the cartridge a good scrub along with a couple of cartridges but no deal.

            There's not noticeable leaks around the caps although theres a yellow substance is the corner next to the the rear inputs.

            To my untrained eyes theres also no corrosion. I've attaches some pics.

            Cheers.

            Sent from my LG-H930 using Tapatalk

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            • #7
              Can you get a better shot of this IC? Click image for larger version

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              • #8
                Yep will do. Sorry, been busy setting up my mame box. I put tge snes back together will will try to take it apart this week before easter. What are you thinking with that IC?

                Sent from my LG-H930 using Tapatalk

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                • #9
                  could be the photo, but looks like something's funky with the legs on it.

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                  • #10
                    You thinking fifth and sixth legs from bottom left? I spotted that too.
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                    • #11
                      Yup. Could be dust, but worth checking!

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                      • #12
                        Originally posted by darkjedi View Post
                        Yup. Could be dust, but worth checking!
                        Hi guys,

                        Finally managed to take some new pics. Its definitely not dust. It looks like the legs are a bit corroded and from side on they look like they've been pushed down.

                        Cheers.

                        Sent from my LG-H930 using Tapatalk

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                        • #13
                          Originally posted by poora View Post
                          Hi guys,

                          Finally managed to take some new pics. Its definitely not dust. It looks like the legs are a bit corroded and from side on they look like they've been pushed down.

                          Cheers.

                          Sent from my LG-H930 using Tapatalk
                          Its possible, but unlikely.

                          Get some good solder paste and a flux pen, clean it all up with the flux pen, dry it all off, put some solder paste along the pins and hit it with hot air.

                          The paste will melt and go straight to the pads and legs, giving a nice clean joint on all legs.
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                          • #14
                            Sorry just saw this post. That sounds pretty straight forward to do.

                            Any online stores you'd recommend?

                            Sent from my LG-H930 using Tapatalk

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                            • #15
                              Jaycar, R14, RS.
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