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  1. #31
    iMac G5 20" Mid 2005 (Maybe)
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
    Posts
    11,285
    Now I have two iMac G5 20" machines! Second one seems in better form. I was thinking about reflowing the GPU with a gas burner lighter as suggested by someone. I've also seen it on YouTube. I guess using flux would be a good idea apart from changing the capacitors. What are your thoughts on this?

    My thoughts...??? A complete waste of time and the carbon build up that will no doubt occur will make it even harder to use proper software and equipment and get the contacts clean.

    Your question about using flux suggests to me that you have very little knowledge of proper soldering techniques. I'd suggest you do a bit of reading on proper soldering procedures. Super clean contacts is a must, and there are good reasons that the proper flux and solder is used. Sigh... :





    - Patrick
    ======

  2. #32
    Quote Originally Posted by pm-r View Post
    My thoughts...??? A complete waste of time and the carbon build up that will no doubt occur will make it even harder to use proper software and equipment and get the contacts clean.

    Your question about using flux suggests to me that you have very little knowledge of proper soldering techniques. I'd suggest you do a bit of reading on proper soldering procedures. Super clean contacts is a must, and there are good reasons that the proper flux and solder is used. Sigh... :





    - Patrick
    ======
    I'm not entirely a rookie, but I'm no pro either. But, I do know how to solder and such. I have a professional soldering station, but I'm missing the hot air station. It is quite expensive in my country, but maybe I should make the investment. I will probably use it again on other projects. I emailed to a specialist shop earlier today in regards to proper tools and such. They will probably reply tomorrow (Monday). You guys are right I need to do it right instead of cutting corners.

    - - - Updated - - -

    Quote Originally Posted by pigoo3 View Post
    I kinda already commented on this earlier in the thread (GPU reflowing & You Tube videos on it).

    All I can say is good luck (really...I hope you are successful). But don't be surprised if you end up with a permanent doorstop.

    - Nick
    You're right! It may be a bit stupid to cut corners and ending with a doorstop(s). I'm not entirely a rookie, but I'm no pro either. But, I do know how to solder and such. I have a professional soldering station, but I'm missing the hot air station. It is quite expensive in my country, but maybe I should make the investment. I will probably use it again on other projects. I emailed to a specialist shop earlier today in regards to proper tools and such. They will probably reply tomorrow (Monday). You guys are right I need to do it right instead of cutting corners.

  3. #33
    iMac G5 20" Mid 2005 (Maybe)
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    40,784
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by MacGuyFrom1831 View Post

    You're right! It may be a bit stupid to cut corners and ending with a doorstop(s). I'm not entirely a rookie, but I'm no pro either. But, I do know how to solder and such. I have a professional soldering station, but I'm missing the hot air station. It is quite expensive in my country, but maybe I should make the investment. I will probably use it again on other projects. I emailed to a specialist shop earlier today in regards to proper tools and such. They will probably reply tomorrow (Monday). You guys are right I need to do it right instead of cutting corners.
    You could look at things this way. If you're going to experiment or gain some experience reflowing a GPU...might as well do it on an inexpensive 13-14 year old computer.

    Good luck if you decide to move forward with it...and of course please let us know how things turn out (either way...no judging).

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  4. #34
    Major UPDATE!

    I have some new information in regards to the iMacs that I bought at the flea market. The second one, which I wanted to buy in the first place is an older model than the one I bought first. The model number for both of them are iMac G5/2.0 98845LL-A (ALS) PowerMac 8.2 and iMac G5/1.8 M9259LL-A PowerMac 8.1. They are both A1076 models. Older one (PowerMac 8.1) seems in better shape, but the previous owner was a hard smoker or so. The entire unit was covered in some yellowy smock. I had to clean it with different items to clean it properly. The problem was the same inside of the iMac. After cleaning it and inspecting it I could see that it was in a “better” form as it had fewer damaged capacitors. As you can see in the pictures most of them are in good shape. The mac does have some artifacts, but it is much better than the newer iMac. I am inclined to think that the problem is not the GPU as such, but mainly a capacitor problem for them both. I think they both have the same problems and both needs to have their damaged capacitors exchanged. Would it make things worse if a reflowed a non-problematic GPU? Or would it just make it “better”? Does anyone know what that black cable is for? I think it is for the Harddrive sensor, but there is no plug for it? Maybe the previous owner changed the HDD?

    Thank you for listening ��
    Attached Images Attached Images
    Last edited by MacGuyFrom1831; 02-04-2019 at 10:43 AM.

  5. #35
    iMac G5 20" Mid 2005 (Maybe)
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    40,784
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by MacGuyFrom1831 View Post
    Would it make things worse if a reflowed a non-problematic GPU?
    If the GPU in this case is "non-problematic"...why would it need to be reflowed? And...if you tried to reflow a non-problematic GPU...if something goes wrong with the re-flow (which is very well might)...now you have a problematic GPU.

    Quote Originally Posted by MacGuyFrom1831 View Post
    Does anyone know what that black cable is for? I think it is for the Harddrive sensor, but there is no plug for it?
    I'm probably wrong...but in the 5th & final photo with the black cable...I can see what looks like a white colored socket just to the left of the RAM that looks like a socket that the cable may plug into. Back in the day...many cable sockets were made of white plastic. Now Apple is using black colored cable sockets (same color as the cables & cable connector end).

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  6. #36
    iMac G5 20" Mid 2005 (Maybe)
    pm-r's Avatar
    Member Since
    Oct 16, 2010
    Location
    Brentwood Bay, BC, Canada
    Posts
    11,285
    I'm probably wrong...but in the 5th & final photo with the black cable...I can see what looks like a white colored socket just to the left of the RAM that looks like a socket that the cable may plug into.

    The ifixit.com site may or should have some decent photos or suggestions that cold work as a guide.

    I don't know if the Apple Service Source manuals were available for those Macs but even so, are not the easiest things to get hold of, but maybe try googling but they may only be available via some unmentionable Mac pirate sites.





    - Patrick
    ======

  7. #37
    Quote Originally Posted by pigoo3 View Post
    If the GPU in this case is "non-problematic"...why would it need to be reflowed? And...if you tried to reflow a non-problematic GPU...if something goes wrong with the re-flow (which is very well might)...now you have a problematic GPU.



    I'm probably wrong...but in the 5th & final photo with the black cable...I can see what looks like a white colored socket just to the left of the RAM that looks like a socket that the cable may plug into. Back in the day...many cable sockets were made of white plastic. Now Apple is using black colored cable sockets (same color as the cables & cable connector end).

    - Nick
    Hey Nick. The cable is already plugged into that white switch. The question is where does the other end go? On some videos I've seen there should be a switch on the HDD tray, which is not there in my case?

  8. #38
    iMac G5 20" Mid 2005 (Maybe)
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    40,784
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by MacGuyFrom1831 View Post
    Hey Nick. The cable is already plugged into that white switch. The question is where does the other end go? On some videos I've seen there should be a switch on the HDD tray, which is not there in my case?

    Ok...good deal...I got confused.

    Member pm-r made a great suggestion to visit ifixit.com. Check out the various procedures there for your iMac model. ifixit.com has many different procedures for each computer model...and the procedures are very detailed with lots of photos. I would look at the procedure for removing the logic board...which should almost definitely require the disconnecting of all wires/cable to/from the logic board.

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  9. #39
    iMac G5 20" Mid 2005 (Maybe)
    dtravis7's Avatar
    Member Since
    Jan 04, 2005
    Location
    Modesto, Ca.
    Posts
    29,980
    Your Mac's Specs
    iMac late 2012 21.5 i5 10:14. iMac 2010 27"QuadI7 OS10.13, MBPLate2011, iPad Pro10.5", iPhone7
    That latest one you got sure looks better. Be sure no cap is swelling on it's top. Even if there is no leakage it could be bad. I would change anything that looks bad in any way.

  10. #40
    UPDATE

    I haven been able to remove the artifacts and errors :p The Cleaning did the job, but I will still replace the damaged capacitors! And also upgrade the RAM to max and perhaps install a SSD in them both (if possible).
    Attached Images Attached Images

  11. #41
    Quote Originally Posted by pm-r View Post
    The ifixit.com site may or should have some decent photos or suggestions that cold work as a guide.

    I don't know if the Apple Service Source manuals were available for those Macs but even so, are not the easiest things to get hold of, but maybe try googling but they may only be available via some unmentionable Mac pirate sites.





    - Patrick
    ======
    Hi Patrick. Thank for the nice advice! I've been looking at iFixit and their videos on YouTube in regards to repairs and disassembly. Really good stuff! However, I was not able to find those manuals yet... But, I know I have seen them on one site particular

    - - - Updated - - -

    Quote Originally Posted by pigoo3 View Post
    Ok...good deal...I got confused.

    Member pm-r made a great suggestion to visit ifixit.com. Check out the various procedures there for your iMac model. ifixit.com has many different procedures for each computer model...and the procedures are very detailed with lots of photos. I would look at the procedure for removing the logic board...which should almost definitely require the disconnecting of all wires/cable to/from the logic board.

    - Nick
    Hey Nick. I've looked there and I found out that it was supposely a HDD sensor cable. But, the switch on the HDD is nowhere to be found?

  12. #42
    Quote Originally Posted by dtravis7 View Post
    That latest one you got sure looks better. Be sure no cap is swelling on it's top. Even if there is no leakage it could be bad. I would change anything that looks bad in any way.
    There are some swelling caps and some that are "running". But, it is nowhere near as bad as the first one. I originally intended on picking up this one first, but by accident I took the wrong one in some confusion. If you look at the pictures you can see there are caps that needs to be replaced. I wish I could find some diagram or such in regards to the motherboard etc.

  13. #43
    iMac G5 20" Mid 2005 (Maybe)
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
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    40,784
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by MacGuyFrom1831 View Post
    Hey Nick. I've looked there and I found out that it was supposely a HDD sensor cable. But, the switch on the HDD is nowhere to be found?
    Here's a photo of a new hard drive I purchased a couple months ago. Even though you have a 2005 iMac...and the HD I have was purchased just a couple months ago...it looks to me that the black cable would attach to the area in the red circle on my HD. Maybe your HD does or doesn't have the same connector:


    IMG_1653.JPG

    HTH,

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

  14. #44
    Quote Originally Posted by pigoo3 View Post
    Here's a photo of a new hard drive I purchased a couple months ago. Even though you have a 2005 iMac...and the HD I have was purchased just a couple months ago...it looks to me that the black cable would attach to the area in the red circle on my HD. Maybe your HD does or doesn't have the same connector:


    IMG_1653.JPG

    HTH,

    - Nick
    Hey Nick. I'm not able to see your picture?

  15. #45
    iMac G5 20" Mid 2005 (Maybe)
    pigoo3's Avatar
    Member Since
    May 20, 2008
    Location
    U.S.
    Posts
    40,784
    Your Mac's Specs
    2011 17" MBP 2.2ghz, 16gig ram, OS 10.11.6
    Quote Originally Posted by MacGuyFrom1831 View Post
    I haven been able to remove the artifacts and errors :p
    Not 100% sure what's being said here due the spelling ("haven").

    Are you saying you "have" or "haven't" removed the artifacts and errors?

    - Nick
    - Too many "beachballs", read this: Beachballs
    - Computer seems slower than it used to? Read this for some slow computer tips: Speedup
    - Almost full hard drive? Some solutions. Out of Space
    - Apple Battery Info. Battery

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