How i can solve back key problem its not working properly

Check setting. Should have wifi activated.
Now, go to any hotspot and try to conect. If you can't, your smartphone has some problem

Look in your manual for setup, activate internet or wifi
Have no manual?

LG Optimus Vu II User Manual Guide

LG Optimus vu II F200 Review Features Specifications Build Quality Display...

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how to connect my lg F200L with wifi

You can reset it using a soft or hard reset. The following instructions provide you with information on how to reset the Nokia 5130 using both methods.

• Soft Reset

The soft reset is often the better option if you are worried about losing data. There is a chance the soft reset will also default to the factory settings, but there is a bigger chance that it will not. With a soft reset you will enter in *#7380#. This tends to clear any pending errors and on most phones it will help your phone work properly.

• Hard Reset
• The code for Hard Reset is *#7370#. Enter these digits into the phone and press yes to confirm. This will start the initialization process. Make certain you have already saved all important data. You do not want to lose your contacts, memo, or other information due to a hard reset. You may have issues with a Nokia phone that is not turned on. If there are problems such as these you can try hitting three buttons simultaneously. Hit the +*+3. If you can hit these three buttons all at once you may be able to get the phone to turn on, and then you can go through the hard reset with the proper codes.
  

These codes work with all of the Nokia models including the 5130. You may find other options do exist such as the power button while pressing the space key and delete key, and caps/ shift button will also hard reset the phone.
It all depends on whether or not the *# keys work. Sometimes they won't work if the phone is in phone lock or key pad lock and you need to get it open first.

Assuming you have already emptied the bucket (?), the bucket may not have been reinstalled properly. When this happens, you get what you described. Turn the unit OFF & unplug it. Remove the water collection bucket an reinstall it, so the it fits "squarely" into the bucket holder from top to bottom. It needs to make firm contact with the bucket removal safety switch on the left rear wall of the bucket holder. The bucket should not tilt down at the bottom when installed properly. Plug the cord back in and turn the unit ON. Set the humidity extraction level to 35%. If installed properly, the unit should turn ON within 5 seconds.

If the above does not solve the problem, the bucket safety removal switch may be broken. Remove the bucket and try activating it with your finger while the bucket is removed. If the unit doesn't start within a fem seconds, the switch is bad and should be replaced.

Hope this helped you troubleshoot and solve the problem. Thanks for choosing FixYa.

Hi,

From the main menu screen, press Contacts [Right Soft key].
Press Options [Right Soft key].
Select a contact from the contacts list.
Press the Right Soft key for options.
Scroll to Manage Contacts, press OK
Select Erase, press OK.
Press Right Soft key to select all or select desired contacts to erase by pressing OK to mark each contact.
Press Left Soft Key for Done.
Display shows Erase Contacts?
Select Yes, press OK.

If this does not work, "Power the phone off for 30 minutes and then power it back on and try it again."

Regards

hello depp!
try to clean contacts on mobile and battery gently. insert properly and try, if still not working try to bent battery contacts softly (be carefull not to break) with a small screw driver. if all fails propably new battery is defective
regards

If you feel confident and competent enough, try taking your phone apart and giving the internals a good clean, take the white keypad PCB out and clean both it's contacts and the contacts on the phone's mainboard, and clear out any dust. Put the phone back together and see if that's solved the problem. It could also simply be that the keypad connector has worked loose




Key Pressed : Key presses phone appears to see
:
3 : 3 then left soft key
6 : 6 then right soft key
9 : 9 then back
c : c then #
left soft key : 3 then left soft key
right soft key : 6 then right soft key

(All the other keys worked correctly)

As I didn’t know what was causing this I attempted to move all data stored on the phone to the memorystick so I could master reset and possibly reflash, although after this I returned to the homescreen to find all keys had started functioning correctly again,





Key Pressed : Key presses phone appears to see
:
3 : 3 then left soft key
6 : 6 then right soft key
9 : 9 then back
c : c then #
left soft key : 3 then left soft key
right soft key : 6 then right soft key

(All the other keys worked correctly)

As I didn’t know what was causing this I attempted to move all data stored on the phone to the memorystick so I could master reset and possibly reflash, although after this I returned to the homescreen to find all keys had started functioning correctly again,

If you haven't already done so, try this: take out the SIM card, wipe it down with a dry, soft cloth, and reinstall it WHEN the phone asks for it.

hi,
welcome to fixya.com,sir if u have already uninstalled and reinstalled the drivers and if u have already reinstalled the operating system and if it is still not working then simply replace the system motherboard.