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Jeff Liebermann Jeff Liebermann is offline
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Default reflowing BGA with a hot air gun?

On Thu, 08 Feb 2018 17:37:25 -0800, wrote:

Thanks for the advice Jeff. And the link. I did take this machine
apart once about 5 years ago to replace the hard drive. That all went
fine.


That's a start. However, to reflow the BGA chips on the motherboard,
you'll need to remove the motherboard from the plastic case. I take
photos as dive into the machine. Seems to impress (or panic) the
customer. For example:
http://www.learnbydestroying.com/jeffl/pics/repair/HP%20Envy%20m6%20clogged%20fan/slides/HP%20Envy%20m6%20A10%20CPU.html

Your "unspecified model ASUS" remark made me laugh because
when I was typing out the original message I realized I didn't have
the model number on hand and knew at the time that I really should
have included it with my post. I always seem to get caught.


That's a catch phrase that I use quite often. An amazing number of
people ask questions without supplying much in the way of identifying
the device they're trying to repair. If they're stuck on something,
they will describe what they've done, but not what problem they're
trying to solve. After many years, I suspect the problem is chronic.
Here's my magic formula for getting mostly sane answers on forums and
newsgroups:
1. What problem are you trying to solve? No history or product
reviews, just the problem.
2. What have you done so far and where are you stuck? What happened?
3. What do you have to work with? Maker, model, version, numbers.

This won't work for a laptop, but I've been successfully reflowing HP
Jetdirect cards in a toaster oven. So far, 18 working boards out of
20:
http://www.learnbydestroying.com/jeffl/pics/repair/BGA%20reflow/index.html
Also about 15 assorted HP printer PC boards and a few game boards.
Protecting plastic parts, that are easily melted, is the main problem.
Aluminum foil shields do not work, so I have to remove the parts. Most
everything else that can survive PCB soldering, can survive the
toaster oven reflow. Unfortunately, there are too many plastic parts
on a laptop motherboard, so it's not going to work.



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Jeff Liebermann

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Skype: JeffLiebermann AE6KS 831-336-2558