Question about Samsung SGH-d807 Cellular Phone

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Sub Keymat the buttons on the front of my phone stop working

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You need to take the phone to a mobile service center and have the sub pad replaced.

Posted on Jun 03, 2008


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Posted on Jan 02, 2017


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Why Onkyo HTS-9400THX: Front both and subwoofer not working.?

Try differnt speakers, if they do not produce sound, amp channels may be blown and then you need to take it to a shop.

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Auto key pad working

wash pcb with petrol and check again if doesnt work properly resold keypad ic with resolder paste because i hope pcb has some water or any liquid form under the keypad ic and remove keymat and clean keymat area on pcb if doesnt work yet resold upp carefully Note; cover up sim card connector and glued ic`s when you resold cpu

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My k1 is in great condition but is missing 1/4'' center menu button and I would like to replace it. can anyone help me!!

That button is part of the keymat assembly, so the only real option is to change the whole thing - it's easy to do, though - just remove the battery, memory card and SIM card, take out the 4 torx screws, remove the rear panel, unplug the display flex cable, then remove the main PCB and the keymat.

It should only take about 5 minutes.

Jul 05, 2009 | Motorola Mobility KRZR K1 Cellular Phone

1 Answer

Front OK * 0 and # stopped working on 2 phones!

I had a similar problem with my buttons. Seems crazy..but once I removed my SD card the buttons started working. Still worked after I put the SD card back in.

Before that I tried removing the battery several times and that didn't help.

May 01, 2009 | LG enV VX9900 Cellular Phone

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Samsung T629 Keypad/button issue.

you need to take the phone and have the sub-board replaced and the phone fully service

Jun 27, 2008 | Samsung SGH-t629 Cellular Phone

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Front lcd mp3 touch buttons don't work

the buttons on the left side act as a hold button and will not you use the front buttons on the mp3 front portion on your phone

Dec 21, 2007 | Samsung SCH-u740 Cellular Phone

1 Answer

Can not hear anyone when they call

check whether can you hear the keypad tones also you can not.then flexi cable is the faulty one .if u can purchase it i follow threw these steps to open the handset.
Using screw driver unscrew 2 screws which is in the back side of front panel.
after that remove the front panel
remove lcd and menu keypad carefully
move the flip to the top position
inside u can find 4 screws and unscrew all those
after that remove number keymat carefully.
then u can find 2 screws and unscrew those.
seperate the upper and lower pwbs carefully and take care while removing the flexi for its repective position
fater placing new one follow the reci of above steps
Better try it in a repair centre

Dec 07, 2007 | Nokia N80 Cellular Phone

1 Answer

Flex connector

remove back cover and battery
you can remove ur front panel by using ur nail it self
u can find white keymat that willbe fixed with flexi , remove it
then remove lcd carefully
unscrew the the four screws in the back panel
then seperate D cover from front panel you can find flex conn
give some little care while removing flexi cable for its position .
plz follow the reci for assembly

Nov 04, 2007 | Nokia 6288 Cellular Phone

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