This instructable shows how to do a DIY rework of BGA components, using a hothair gun and commonly available tools.
Sometimes, expecially if they develop high temperatures during normal operations, the  tin solder connecting their pins with board pads tend to become unreliable.
This is due to continuous expansion/shrinking of the component and/or the board caused by heating. To make a professional repair normally an expensive equipment is required, because BGA components have a specific temperature curve for heating, soldering and cooling. But if you're trying to save an old PC or , as in my case, a satellite TV receiver,  this instructable might make your day.

Have fun!

Step 1: Tools needed

What you'll need:

- some scrap iron strips, I got mine from the one used to hold loads on pallets.
- pliers or vice
- hot air gun
- tin solder and flux
- soda can
- scissors
- some thick iron wire,(cloth hangers??)
<p>This is actually technically a re-flow, not a rework. The difference being that a rework involves completely removing the solder balls from the BGA component (in most cases being a processor of some kind) and replacing them completely.</p>
<p>I like this idea to make solder wire as melting point detection tool. Thanks , it will be really helpful to me for motherboard repair.</p>
HI there. Thank u for your comment. Im actually working<br>On a more accurate temperature controller based on an arduino board<br>Here details of the project Im trying to replicate<br><br>http://smokedprojects.blogspot.it/2013/11/stripboard-pid-arduino-shield-hardware.html?m=1<br><br>Cheers<br><br>Angelo<br>
<p>What would happen if the &quot;shiny metal ball&quot; of solder was to roll off the top of the Chip ?</p><p>would it not via capillary action, dispense under the Chip messing up the BGA ??</p>
<p>proper bga reworking requires making a profile for the chipset to be reworked</p><p>using a heat gun merely provides a band aid as it can not supply the appropriate heat required which is bottom 70% and top 30%</p><p>there are several guides that involve the use of heat guns and griddles and is the reason why bga reflows and reballs have a bad name</p>
<p>I have used a Pancake Grille, turn it to High or 450*F, make some Stand-off's for in my case DV4 M/B about 1&quot; long and you can use foil tape to protect other components. This is your Pre Heater! for botton of M/B, Check Temp's with Thermal couple!!They are inexpensive to buy(Ebay)&amp; MultiMeter, when grille gets to temp set your Project on and start Timer, Then start Heat gun&lt; ( you should check temp setting's before &lt;good practice on heat gun) This was to rework ATI Video Chipset(common problem W/DV4-6-9) ROSH STD No Lead makes bad solder joints... Yes remove red epoxy at conor's if any &lt;...I mounted heat gun on old MicroFish table adjust up and down to help maintain heat..</p><p>You might look for infrared light with small computer fan say 12vcc powered by 5vcc for less RPM to blow air,,, OR toaster oven quartz element long tube fan on top ?? endless idea's </p>
Will this still work of there's epoxy on the component?
Sometimes companies put epoxy all around the edges of the component to make it more &quot;resistent&quot; to the problem of thermal expansion/shrinkage. In order to apply my method I think such epoxy need to be removed first. With the same heatgun, heat the epoxy. Once heated, epoxy softens and can be removed with some sharp tool, making care not to damage any other component or track around
hebat sekali, akan saya coba.. terima kasih
Very good work...great <br> thanx......
glad to see I am not the only one who does this.
i've done this in the past to reball graphic chips on g3 mac laptops.<br><br>though with one I made the mistake of toughing the chip with the gun while it was hot and I believe it moved the chip.<br><br>others worked great.
Well done, you might hack a heating element from a toaster oven to preheat the board it can help with board warping which can be a problem with thin boards.
This is a good simple instructable. Is serves the same basic principle of a quality SM rework station. I know this because I used to build them. <br> <br>Now if you could find a way to use infrared you would have a great thing. <br> <br>And I would refrain from using any open flame for the heating process as the flux is flammable to open flames, just a safety suggestion. <br>
*RELLY NICE* instructable!<br>I worked a long time on many many satellite receiver boards with BGA to be reworked.<br>Even using a gigantic &amp; expensive machine, It didn't much more than you did with this hot air gun...<br>Only the heating/cooling curve was *respected* in all parameters.<br>Nothing really more.<br>I would like to check your procedure ASAP!<br>ciao<br>Mario
so how do i know if this bga chip is bad or unsoldered?
using that small roll of solder lead as a thermometer, is very smart, now i dont have to guess if i got the right temp! thanks...
Nice instructable!!! Did the same procedure last week, with a pentorch.... This instructable would have helped me a lot! (it worked just fine even with the pentorch...)

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