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Dust in LCD displays(11c,41 and 71)



#8

Hello all,

Does anybody know how to get the dust out of the inside of the LCD's on these calcs.

I have compressed air(for computer equipment). Is there a spot or opening I could shoot the air into to get the dust out. Will it damage the display if I do this?

Or am I looking at a few hours and taking these things apart? I really don't want to open the 11c. It's mint including the feet. I don't want to mess them up.

I know these displays need some breathing room for the temp changes. But all the HP LCD calcs seem to have dust on the inside of the displays.

HP should have made it harder for the dust to migrate inside the display like that.

Thanks for reading,
Christopher


#9

Hi,

there are also problems with the older pioneer-series. One of my 32s is filled with dust - I cannot see a chance to remove it.

Same problem with 1xc-series !!!

Any ideas ?

Andreas


#10

When my 42S got dust on the display, I found that I could
get it out by _slightly_ prying the case apart along the
seam, next to the LCD, and blowing compressed air into it.
By "slightly", I mean just enough to make the seam no longer almost airtight. Not far enough that you could actually see inside, or hear plastic cracking. :-)

Stefan

#11

With the HP-41, if you open it up, you can blow compressed air at one side of the display to move dust away from the main LCD area, but the best way is to remove the display and clean.


#12

My units are not that bad. I guess I'm a little bit of a perfectionist when it comes to my HP equipment. One of my 41's has a chunk of something right over one of the display segments. It's annoying but I guess I'll have to live with it. I really don't want to take them apart.

I was hoping maybe I could put the compressed air nozzle in the card reader clip holes on the 41 and clean it out that way. Maybe I'll give it a try anyway and see what happens.

Thanks for the suggestions,

Chris


#13

Be sure you use an oilfree compressor (teflon ring type) preferably with a moisture trapper or filter, or a really good filter on an oil lube compressor. Other than that it's worth a try, though high pressure could blow something eles loose, use the regulator and start with lower pressure.


#14

<Be sure you use an oilfree compressor (teflon ring type) preferably with a moisture trapper or filter, or a really good filter on an oil lube compressor.>

I am using canned compressed computer air.

BELKIN "The Blaster"

I was able to clean out my CX by spraying it into the port openings. I tried the card reader attachment holes but that didn't work.

On my '80 41C I couldn't get all the dust out. Some of it is stuck to the inside of the glass. I guess I will have to open it up to clean it out.

One note if you use this type of method be careful not to tip the can when spraying. Keep it vertical at ALL times. You can forget when your trying to get the nozzle inside the ports and tip the can. The result could be a nice frosty display.

Chris


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