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KEYS 9OL. NOT WORKING SOMETIMES - Dell 0Y3740 Keyboard

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I get the same thing, until I press the shift key, then it comes back.... for a while. Very odd. So-far only witnessed this under Linux Mint and Ubuntu, just resetting the laptop back to Windows to see if that helps...

Posted on Jan 06, 2015

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Posted on Jan 02, 2017

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Mouse touch pad not working


'F9' keys has a mouse, no mouse looking symbol. sometimes you use the 'Fn' key in conjunction with 'F9' key, sometimes not. Give it a try by itself and use it. If not hold the Fn key and hit F9 and try again.

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Tip

How to repair keypad problem in China Mobile


First we need to know china phone keypad connected with PCB how way
(A) Direct on PCB
(B) Flex System (flex cable direct soldering pcb to keypad panel)
© Flex and socket system include (flex one side soldering with key panel other side connect to pcb with socket)
(D) only Socket System (here have 2 socket, 1 with key panel others with pcb)
Keypad problem have various type
1. All key not work.
2. some key work and some other not work.
3. sometimes work and sometimes not work.
1. All key not work
china phone all key not work for this type of problem
(A) though its touch screen phone, first try to disconnect touch panel line from phone pcb or display flex (4 line)
(B) though not solve and keypad direct on pcb first you try to good clean full pcb with cleaner.
© though not solve now you try to format/flash your phone because some time key problem come from software problem.
(D) though still not solve now you check must be CPU. 95% china phone keypad directly going in cpu. and other 5% first going to resistor or capacitor near the cpu or keypad than going to cpu. so now first check them than you can try to re-hot, re-soldering or changing cpu.
(E) though its flex or socket system, first check GND connection continuslay pcb to key panel. next check full flex or socket all line going continuously pcb to key panel or not. also sometimes flex or socket shorted with other line or gnd so check also them.
(F) Also you can check all key anyone is short 2 line.
(G) sometimes keypad line broken from cpu pin on pcb to key panel, so check them.
2. Some key work and some other not work
Some key work and some other is not work for this type of problem
(A) maximum time this problem we face for flex or socket system keypad. so check flex cable and socket all line any line is broken or not and though need change them. and check all key connection on key panel.
(B) though its direact on pcb, some of key line broken internaly. and maximum china phone have alternative test point near every key or with other key on keypad. so check them with multimeter and though need connect to not work key with near testpoint or other working key.
© common problem is keypad metal ball (which is short 2 line on key when we press) sometimes its damage for phone water damage or over key voltage, so clean them or change.
(D) also try to check line continuously from cpu to not working key.

3. sometimes work and sometimes not work
this problem come from this defect
(A) flex or socket system keypad any line is bad soldering or do lose contact. check them and
re-soldering or keep there line join with extra ware.
(B) for cpu bad soldering or cpu pin is broken. so re-hot or re-ball cpu.

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1 Answer

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most likely just the battery in key fob. take it to oreileys and they can test to see if its the battery

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have you spilt something onto the keyboard at all?

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From what you describe it sounds like the shift linkage needs adjustment.Was any work done on the transmission,or did you bottom out recently? I don't think it's electrical.Also don't keep a lot of keys on your ignition key ring this can wear the key slot and also cause the erratic starts.Good luck.

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Inspect teeth on second key for wear and tear, car cylinders are very precise when it come keys if it shows wear or damage, I would have another key cut to own for emergency's.

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Sometimes the keys work and sometimes I have to


take a vacuum cleaner and clean the keys nicely... might be something is stopping it ,,, it still the problem is there u would have to replace it

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Contact problem more common with any phone. Simply problem, somtimes you have to take a part the phone clean it, dry it to fix that.
You can buy a special cleanig solution for wather dammage from ebay if you realy want to fix this alone.

But if you hawe waranty, use ti!!!

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