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Wasmachinemann-NL |
2014-03-22
, 21:33
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Posts: 386 |
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Joined on Aug 2011
@ Netherlands
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#1
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One of my N900s have a few non-working keys, the Sym/Ctrl, the key beneath it and the Shift key, the T key and the Up and Right arrow key are dead, what could this be? I know it's HW related.
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2014-03-22
, 22:39
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Moderator |
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Joined on Dec 2009
@ Bize Her Yer Trabzon
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#2
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screw it open, and see if the 'dome sheet' is ok.
Also: Are you sure you didn't threw it in the washing machine?
hehe
Also: Are you sure you didn't threw it in the washing machine?
hehe
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2014-03-23
, 07:58
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Posts: 386 |
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@ Netherlands
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#3
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Originally Posted by HtheB
It had a small ingress of clean bath water once, but I did the right thing and removed the battery immidately after that and let it dry, it worked a few months after that but then suddenly my KB died partially.
screw it open, and see if the 'dome sheet' is ok.
Also: Are you sure you didn't threw it in the washing machine?
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2014-03-23
, 10:18
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Posts: 6,445 |
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Joined on Sep 2012
@ UK
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#4
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Do the affected keys click when pressed? If yes, then it might not be the dome sheet but rather corroded contacts under it, possibly even caused by that immersion in the bath. It is easy to assume that the water started seeping in from the edges and the affected keys is as far as it got before you pulled out. The best way to find out is to open the phone and see.
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2014-03-23
, 15:14
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Joined on Aug 2011
@ Netherlands
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#5
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Originally Posted by pichlo
So I can just remove the dome sheet without tearing it then?
Do the affected keys click when pressed? If yes, then it might not be the dome sheet but rather corroded contacts under it, possibly even caused by that immersion in the bath. It is easy to assume that the water started seeping in from the edges and the affected keys is as far as it got before you pulled out. The best way to find out is to open the phone and see.
EDIT: Removed it, cleaned with nail polish remover, didn't help :c
Last edited by Wasmachinemann-NL; 2014-03-23 at 15:23.
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2014-03-23
, 16:42
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Posts: 4,118 |
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Joined on Aug 2010
@ Ruhrgebiet, Germany
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#6
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Originally Posted by Wasmachinemann-NL
Ouch, nail polish remover?
EDIT: Removed it, cleaned with nail polish remover didn't help :c
Only use clean (medicine or pure) alcohol, e.g. from drug store (pharmacy).
And you should have done immediately after that incident. Now corrosion may have fulfilled its destructive irreversible work.
So if water comes to device:
pull battery immediately, open up device (always), check for water and clean with alcohol (take care of camera module), let it dry (do NOT use hair dryer) upright so water can rinse, maybe put it into closable box with silica gel or rice to let it dry for at least 24h (better 48h) and only after that power on again.
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2014-03-23
, 18:38
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Posts: 386 |
Thanked: 1,094 times |
Joined on Aug 2011
@ Netherlands
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#7
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Originally Posted by peterleinchen
I put it on a hot radiator, worked fine afterward, but for the record: it's not a daily driver so I don't really care for it anymore, it's going on my bike as a computer+GPS later.
Ouch, nail polish remover?
Only use clean (medicine or pure) alcohol, e.g. from drug store (pharmacy).
And you should have done immediately after that incident. Now corrosion may have fulfilled its destructive irreversible work.
So if water comes to device:
pull battery immediately, open up device (always), check for water and clean with alcohol (take care of camera module), let it dry (do NOT use hair dryer) upright so water can rinse, maybe put it into closable box with silica gel or rice to let it dry for at least 24h (better 48h) and only after that power on again.
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2014-03-23
, 18:44
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Posts: 4,118 |
Thanked: 8,901 times |
Joined on Aug 2010
@ Ruhrgebiet, Germany
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#8
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Originally Posted by Wasmachinemann-NL
Also just for the record:
I put it on a hot radiator
a 'warm' and more important a dry place is fine.
Hair dryers and/or "hot" radiators will produce too much heat and a lot of moisture. So sometimes a bit less is much more.
And the 'bad' result may come up oonly after a few weeks/months.
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Thank you all for voting me into the Community Council 2014-2016!
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2014-03-23
, 18:54
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Joined on Aug 2011
@ Netherlands
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#9
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Originally Posted by peterleinchen
Well, whatever your idea of hot is, how about lukewarm? don't remember properly.
Also just for the record:
a 'warm' and more important a dry place is fine.
Hair dryers and/or "hot" radiators will produce too much heat and a lot of moisture. So sometimes a bit less is much more.
And the 'bad' result may come up oonly after a few weeks/months.
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2014-03-23
, 20:58
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Posts: 6,445 |
Thanked: 20,981 times |
Joined on Sep 2012
@ UK
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#10
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Originally Posted by peterleinchen
Beter still, isopropyl alcohol. That's the stuff they use in CD/DVD lens cleaners... or indeed... <gasp>... some nail polish removers
Ouch, nail polish remover?
Only use clean (medicine or pure) alcohol, e.g. from drug store (pharmacy).
But be careful, some removers use acetone, which is a different beast, aggressive to most plastics as well as PCB protective masks. The smell should give it away.
Originally Posted by Wasmachinemann-NL
A rule of thumb, if it is too hot for you to hold it, it is probably too hot.
Well, whatever your idea of hot is, how about lukewarm? don't remember properly.
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