6150 - Fading display

[mappo]

The display on my 6150 fades out now and then.
If I press (hard) above the display (where it says
NOKIA) the text "comes back" but as soon as I let
go, the gext disappears.

I've heard that this is a pretty common problem on
the 6150, the 5110 and the 8210, but I couldn't
find any threads in this forum about it.

On a page I found this image:
It's an LCD connector and the reseller claims that
changing it will solve my problem.

So i pick apart my dear phone...
But I can't find _anything_ that looks like the thing on
the image.

Could someone please give me a hint to where to look.
Is it on the actual circuit board or "inside" the display?
A picture would be awesome!

[johny3310]

6150 have two boards, one is main, ando other is UI board (with LCD and keypad.

Remove UI board from main board.
Detattach LCD (together with metal fram) from this board. LCD is holding to UI board with 4 metal "clicks".
Look the back side of LCD (the white one).
LCD rubber contact is ..... well: made of rubber
It can be grey, green, black, or covered with tiny golden wires

[mappo]

So it's supposed to be between the LCD and the board (?).

Well, there is nothing there. The white back of the LCD
is flat against the board...

OK, suppose I buy this "LCD connector" (doubtful since
it costs ~€10), where does it go? Please tell me as
exactly as possible.

[GoroMilMil]

LCD connector is inside the plastic cover if you see the back of LCD.It provides connection between glass and board.It is possible connector to be glue with glass and be difficult to remove.

[johny3310]

Maybe you need glasses?

Look more carfully:
LCD is assembled from 3 parts:

1. Metal frame
2. Actual LCD (glass part)
3. Plastic back (have white paper on itn with some serial number)

This "plastic part" have hole in which sits rubber LCD contact.
When you take appart LCD from UI board, do you see contacts on UI board for LCD? This contacts are aligned with LCD rubber contact and the contacts on the glass part of LCD.

If you still cannot find this part, it is better to give up and take yor phone to someone to repair it for you.

10 euro should be enough for the part and work

[johny3310]

Originally posted by mappo
OK, suppose I buy this "LCD connector" (doubtful since
it costs ~€10), where does it go?

If you ever find this part , take it out, clean with alcohol, and put it back backwards (part which sits on UI board turn over to LCD). Then you can tighten metal clicks, so LCD sits more firmly on UI board. If you are carefull enough, you can take apart whole LCD and put piece of paper between metal frame and LCD glass.

Don't worry if you break something, breaking is learning

[mappo]

I have glasses
Ok, I found it now. I didn't realize it was a part of
the LCD. I thought it was a separate component between
the LCD and the board.

I took it out, flipped it over and put it back "upside-down"
and it seems like my display works! Thank you!

Is the LCD connector just a piece of rubber or is it
conducting? Could I just save €10 by putting any ol'
rubber gasket or a piece of a cable there instead?

[johny3310]

Originally posted by mappo
Is the LCD connector just a piece of rubber or is it
conducting? Could I just save €10 by putting any ol'
rubber gasket or a piece of a cable there instead?

It is conductive.
It is "sandwich" containig small stripes of conductive and non-conductive rubber. So, if you look carefuly at it you will notice that middl part is like "zebra".