Nokia 6150 fault - certain keys display wrong characters

I have a mint "unused" Nokia 6150. The phone does work (ie you can make
and receive calls) but the "Up" , "Down" , "Menu" and "Names" keys do
not function correctly.

When you press the above keys , instead of the required function ,
certain "characters" are displayed on the LCD. When you press "Menu" ,
you get the number "1" , the "Up" key gives the number "4" , the "Down"
key gives the number "7" and the "Names" key gives the "#" . All these
"wrong" characters are duplicates of the left hand side of the keypad
ie 1, 4, 7 , # .

Any thoughts on likely causes. Is it a corruped EEPROM which needs to
be reflashed? Or is it a faulty keypad membrane (broken track , short
etc)? Or is it something else?

Thanks

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<[email protected]> wrote in message
news:[email protected]
> I have a mint "unused" Nokia 6150. The phone does work
> (ie you can make and receive calls) but the "Up" , "Down"
> , "Menu" and "Names" keys do not function correctly.
>
> When you press the above keys , instead of the required
> function , certain "characters" are displayed on the LCD.
> When you press "Menu" , you get the number "1" , the "Up"
> key gives the number "4" , the "Down" key gives the
> number "7" and the "Names" key gives the "#" . All these
> "wrong" characters are duplicates of the left hand side
> of the keypad ie 1, 4, 7 , # .
>
> Any thoughts on likely causes. Is it a corruped EEPROM
> which needs to be reflashed? Or is it a faulty keypad
> membrane (broken track , short etc)? Or is it something
> else?
>
> Thanks

It could be a duff membrane, but the only way to tell would be to take it
apart and look. The 6150 is dead easy to open up, just 4 torx screws. You
might try removing the backup battery inside, but I can't remember if
that's soldered in or not. Take it apart and clean everything in sight and
see if that cures it.

Ivor

Thanks

Does removing the backup battery provide a "reboot" which might fix the
keypad problem?

Any views on whether a corrupt EEPROM can actually cause "keypad
confusion" or whether a corrupt EEPROM usually has the effect of
complete operational failure?

Any thoughts on why the "Up" , "Down" , "Menu" and "Names" keys are
mirroring the 1, 4 , 7 , and # keys?

Thanks