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Tek LCD screen failure

Yes it very well may. Since freeze spray would take the parts it hits below the dew point in nearly any place around, it will condensate water immediately. One thing that LCD interfaces do NOT tolerate is moisture between the contacts, and we already mentioned that it is NOT going to be a component in a failure mode. So where exactly do you think this freeze spray should be pointed such that it is going to fix a problem, or show where one is at?

It won't, put simply. NORMAL finger pressure placed onto the contactors at the LCD interface connections will do far more toward those goals than introducing a moisture laden failure prone procedure ever will.

Freeze spray is for zapping a suspected transistor or FET with, not a connectivity based mechanical contact issue. There is a place and time for every fix in electronics, and freeze sprays and low voltage LCD panel edge connections are NEVER one of them.

Reply to
ChairmanOfTheBored
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Well poking and prodding often works as well, but I use freeze spray all the time, have been for years and I've never had a problem with condensation but then I don't live in a sauna. You don't need to hose down the whole thing and turn it into a popsicle, just a quick shot here and there. It's great for tracking down marginal capacitors, cracked solder joints, bad solder under BGAs, bad connectors, anything where the problem is intermittant. When a little squirt causes an immediate change in operation you know right where to look.

Reply to
James Sweet

Which I acknowledged for finding a failed PART. This is NOT a case of a failed part. What part of that do you not understand?

When one is looking for a failed part. And don't get me wrong, intermittent behavior IS a failure mode.

Using it to locate mechanical connectivity issues is ludicrous, at best.

Firing freeze spray UNDER a BGA is ridiculous behavior, at best.

When you fire it under a BGA, you will very likely ALWAYS see a difference in circuit behavior. If you cannot see that fact, you have no business being a tech, or attempting to call yourself one.

Also, ANY lab that has an RH below 30% is an ESD hazard, and an ESD event waiting to happen... on a daily basis.

Any lab with an RH above 30%, the recommended value, BTW, WILL condensate water on parts that have been shot with freeze spray.

It is basic physics 101, son. No sauna required. No goddamned freeze spray required either.

Reply to
ChairmanOfTheBored

"James Sweet" wrote in news:pE9Vi.191$gl1.79@trndny09:

I prefer to squirt the spray on a Q-tip and put that on the suspect part. I've seen people get into trouble using freeze spray directly,get led down a false path.

--
Jim Yanik
jyanik
at
kua.net
Reply to
Jim Yanik

If one makes it spray slowly, one can fill a small cap with it, like a mini dewar. vessel. Then, you can dip the Q-tip and soak away heat on suspected parts all day long.

Still, these methods are not very good toward connectorization issues.

Reply to
ChairmanOfTheBored

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