Question about Sony Ericsson K750i Cellular Phone

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Key '3' not working, but everything else is fine. Suspect contamination (dampness from breathing?) below keypad How can I remove the keypad without special tools

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Plz contact at sonyeriscon care center. as  u need to  change ur phone keypad -- dnt try it at home this may demage ur phone body also

Posted on Oct 18, 2007


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'tab' button doesn't work on Motorola MC3190

You get 3 different keypad models of the Motorola MC3190:
- 28 Key Numeric
- 38 Key Shifted Alpha
- 48 Key Alpha Numeric

So depending on the type of keyboard your model has, using TAB are different across these 3 keypads.

Please Note: Keypad functions can be changed by an application so the mobile computer keypad may not function as described.

When the FUNC button is pressed the icon "F" appears on the taskbar on WinCE devices or the icon "Blue Circle" appears at the bottom of the screen on Windows Mobile 6.1 devices.

In order to use the TAB function, do the following:

28 Key Numeric - Press the blue FUNC button (Bottom right next to Power button), and press the RIGHT ARROW button.

38 Key Shifted Alpha - Press the blue FUNC button (Right side below RIGHT ARROW button), and press the RIGHT ARROW button.

48 Key Alpha Numeric - Press the blue FUNC button (Right side below ENTER button) and press the number 9 button.

Apr 18, 2014 | Zebra Symbol MC3190G Handheld Mobile...

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Replacing faceplate on VSI controller

VSI - Replacement of
1. Using a scalpel or similar tool, peel off the
existing Keypad.
2. Carefully clean the area to which the new
Keypad will adhere, ensuring no internal contamination of the unit. An
alcohol-based cleaner is recommended for this.
3. Carefully fit the new Keypad, ensuring the
pads of the keys are not touched and remain clear of any contamination.
4. Test the VSI to ensure all functions operate

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2600 keypad solution

If you are experiencing a keypad issue or other keys are not working. I would suggest to buy a new keypad because the old keypad might not able to reach the mother anymore. By replacing it a new keypad everything will just work fine.

Sep 19, 2011 | Nokia 2600

1 Answer

5 keys are not working ( I J K M ,) on a emachines eME442 laptop

Dear Friend,
you have to disassemble your laptop for this

1 To disassemble carefully remove the keys with a small screwdriver and place in a container. DO NOT use excessive force. Remove all the keys and place in a separate container.

2 Clean the keyboard with cotton swabs lightly dampened (moisturized) with water. Replace these often and be sure they are only slightly damp. If they are too wet the excess water will contaminate the keyboard. Start cleaning. This will clean all water soluble contaminants like Coca-Cola, coffee, and sugar residue. You must clean each and every key space, inside and out, this is critical since this is where the key touches and moves.

Now wipe out full keyboard with paper napkins and then place your laptop in sunlight (3-5 minutes depens on sun) to absorbe the moisture left on the keys or keyboard.

Now assemble your keyboard again as it is earlier. (QWERTY format : for that click a photograph and copy it to your desktop so that it will not be a problem when assembling)

Thank you

Gagan Gupta

Mar 21, 2011 | Televison & Video

1 Answer

GE JBP90 Electric Range - keypad not working

Hi-  If everything worked when stored, problem could be simple. The keypad is linked to the computer with a ribbon connector. The plug may have gotten corroded a bit in storage. Try this first: Unplug power. Remove back panel to access control. Remove four screws holding control. Unplug and inspect connector. Clean with a toothbrush and compressed air if you have it. Plug connector back in, re-assemble, and see if touchpad works.  Let me know if this info helps.  Have more if needed. - Ed

Mar 18, 2010 | GE JBP90 Electric Kitchen Range

1 Answer

I have a RadioShack Pro-39 200 channel some keys don't work

I couldn't locate a manual per se, but this link will take you all the parts of one:

Regarding the keys not working, it's probably due to a "grunge" buildup that's happened over the years. Once the water, soda, dust, and food particles are gone the keyboard should work fine. Open the scanner case and you'll find a rubber/latex pad that sits below the front panel. Remove it and wipe both sides clean with a damp cloth (soap and water are ok if the buildup is really nasty. Wipe the face of the circuit board below the pad to remove any buildup. Dry everything thoroughly then put it back together.

Dec 12, 2009 | Cars & Trucks

1 Answer

Spilt coffee on calculator and now the divide sign doesnt work

Remove the batteries and then you can attempt to clean the key button by spraying it with electronic contact cleaner. However, be very careful to only use a small amount to get around and under the key, as the contact cleaner could damage the key material.

If possible, you should try to disassemble the shell and clean off the keypad with a damp towel (water only) so as not to remove the conductive pads on the underside of the keypad button.

You can also try to use a slightly dampened cloth to get the contamination under the keypad, without disasembling the calculator, but you'll have to wait for a good 24 hours before putting the batteries back in to see if it worked. You really don't want any water residue in there to cause more problems, hence the reason I usually disassemble things and use a contact cleaner to tackle the problem.

Allow the pad to dry before reassembling and you should be back in working order.

You can get the contact cleaner at any RadioShack store.

Hope you find this Very Helpful and best regards!

Aug 19, 2009 | HP 12c Calculator

1 Answer

My keypad wont work except for on/off wotn work

may be your keypad might have worn out or your phonse's software might be under problem. try replacing the keypad in your phone and check it out. it it does not work still then remove the user serviceable parts like panels batteries and clean then using a clean damp cotton sure the cloth is not much wet to affect the ic's of the this also does not work get a pro to attend your phone's software problem,

Aug 16, 2009 | Motorola Mobility MOTO W755 Cellular Phone

1 Answer

At times some butons don't work

You may have a bad keypad, which in many cases can be replaced.


A bad keypad may be worn out due to age, damaged, or it may have gotten wet or otherwise contaminated.


Moisture and contamination can be caused by not using the fan when boiling on the stove top (for over the range models), direct spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation.


I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller.


You can find helpful exploded view diagrams and order parts by entering your model number here:

Aug 10, 2007 | Hotpoint RVM1425 Microwave Oven

6 Answers

Microwave Keypad not working

This model does have a child lock. If it's on, the display will say "LOCKED". It is turned on and off by holding dfown the "0" key for 4-5 seconds. You may also have a bad keypad, which in many cases can be replaced. A bad keypad may be worn out due to age, damaged, or it may have gotten wet or otherwise contaminated. Moisture and contamination can be caused by spraying of cleaners, by storing the microwave in an unheated garage or shed, or infestation. I warn my customers to never spray cleaner directly onto the microwave keypad, since the liquid can get inside and "lock up" or even ruin the keypad or controller. Apply an alcohol-based cleaner (such as the purple kind) to a cloth (paper towels can scratch) and gently wipe it off. I suggest to my customers that they NEVER use any ammonia-based cleaner (like the blue stuff) on a microwave, since the ammonia will crack and distort polycarbonate plastics. Repost if you need more help.

Nov 04, 2006 | LG LMVM1935 Convection/Microwave Oven

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