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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??)
Azurial29 days ago

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.

GopalS16 months ago

I like this idea to make solder wire as melting point detection tool. Thanks , it will be really helpful to me for motherboard repair.

undinstructable (author)  GopalS16 months ago
HI there. Thank u for your comment. Im actually working
On a more accurate temperature controller based on an arduino board
Here details of the project Im trying to replicate




What would happen if the "shiny metal ball" of solder was to roll off the top of the Chip ?

would it not via capillary action, dispense under the Chip messing up the BGA ??

xboxhaxorz1 year ago

proper bga reworking requires making a profile for the chipset to be reworked

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%

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

vtails1 year ago

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" 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)& MultiMeter, when grille gets to temp set your Project on and start Timer, Then start Heat gun< ( you should check temp setting's before <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 <...I mounted heat gun on old MicroFish table adjust up and down to help maintain heat..

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

Juckix1 year ago
Will this still work of there's epoxy on the component?
undinstructable (author)  Juckix1 year ago
Sometimes companies put epoxy all around the edges of the component to make it more "resistent" 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
h3roe3 years ago
hebat sekali, akan saya coba.. terima kasih
mraspotcnc4 years ago
Very good work...great
Astinsan4 years ago
glad to see I am not the only one who does this.
altomic4 years ago
i've done this in the past to reball graphic chips on g3 mac laptops.

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.

others worked great.
5150tech4 years ago
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.
jonesgang4 years ago
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.

Now if you could find a way to use infrared you would have a great thing.

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.
mario595 years ago
*RELLY NICE* instructable!
I worked a long time on many many satellite receiver boards with BGA to be reworked.
Even using a gigantic & expensive machine, It didn't much more than you did with this hot air gun...
Only the heating/cooling curve was *respected* in all parameters.
Nothing really more.
I would like to check your procedure ASAP!
zack2475 years ago
so how do i know if this bga chip is bad or unsoldered?
profpat5 years ago
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...
Fypsigon5 years ago
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...)