Question about RIM Blackberry 8310 8320 8330 Curve 8100 8110 8120 8130 Pearl Car Charger / Veh

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The keypad none funtion

The keypad # * 1 ALT no work , i replaced the keypad pcb membrance already but it still not work ...... thanks

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  • 541 Answers

Contact service center as this is hardware problem

Posted on Jul 10, 2009

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Posted on Jan 02, 2017

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How to get the 5E error off my display on my kenmore microwave


fix it.
SE Shorted key 1. Check if cable of keypad has been inserted into connector of main PCB. 2. Check for short between main PCB and connector or keypad and cable. 3. If there is not a problem with connector on main PCB and cable of keypad, replace the main PCB.

Jan 22, 2016 | Kenmore Microwave Ovens

Tip

How to repair keypad problem in China Mobile


First we need to know china phone keypad connected with PCB how way
(A) Direct on PCB
(B) Flex System (flex cable direct soldering pcb to keypad panel)
© Flex and socket system include (flex one side soldering with key panel other side connect to pcb with socket)
(D) only Socket System (here have 2 socket, 1 with key panel others with pcb)
Keypad problem have various type
1. All key not work.
2. some key work and some other not work.
3. sometimes work and sometimes not work.
1. All key not work
china phone all key not work for this type of problem
(A) though its touch screen phone, first try to disconnect touch panel line from phone pcb or display flex (4 line)
(B) though not solve and keypad direct on pcb first you try to good clean full pcb with cleaner.
© though not solve now you try to format/flash your phone because some time key problem come from software problem.
(D) though still not solve now you check must be CPU. 95% china phone keypad directly going in cpu. and other 5% first going to resistor or capacitor near the cpu or keypad than going to cpu. so now first check them than you can try to re-hot, re-soldering or changing cpu.
(E) though its flex or socket system, first check GND connection continuslay pcb to key panel. next check full flex or socket all line going continuously pcb to key panel or not. also sometimes flex or socket shorted with other line or gnd so check also them.
(F) Also you can check all key anyone is short 2 line.
(G) sometimes keypad line broken from cpu pin on pcb to key panel, so check them.
2. Some key work and some other not work
Some key work and some other is not work for this type of problem
(A) maximum time this problem we face for flex or socket system keypad. so check flex cable and socket all line any line is broken or not and though need change them. and check all key connection on key panel.
(B) though its direact on pcb, some of key line broken internaly. and maximum china phone have alternative test point near every key or with other key on keypad. so check them with multimeter and though need connect to not work key with near testpoint or other working key.
© common problem is keypad metal ball (which is short 2 line on key when we press) sometimes its damage for phone water damage or over key voltage, so clean them or change.
(D) also try to check line continuously from cpu to not working key.

3. sometimes work and sometimes not work
this problem come from this defect
(A) flex or socket system keypad any line is bad soldering or do lose contact. check them and
re-soldering or keep there line join with extra ware.
(B) for cpu bad soldering or cpu pin is broken. so re-hot or re-ball cpu.

on Jan 06, 2010 | Cell Phones

1 Answer

Printing blank copies


1. No transfer charging. A. The connector terminals of the high-voltage PCB make poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. B. Defective engine PCB. Replace the engine PCB and check for correct operation. C. Defective high-voltage PCB. Replace the high voltage PCB and check for correct operation. 2. No LSU laser is output. A. Defective laser scanner unit. Replace the laser scanner unit (see page 1-6-29). B. Defective main PCB. Replace the main PCB and check for correct operation. 3. No developing bias is output. A. The connector terminals of the high-voltage PCB make poor contact. Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable. B. Defective engine PCB. Replace the engine PCB and check for correct operation. C. Defective high-voltage PCB. Replace the high voltage PCB and check for correct operation.

Jun 09, 2015 | Kyocera Mita Drum Cleaning Blade Km 1620...

1 Answer

Acer laptop shift key doesnt funtion cant get email without an at key what to do


Do a factory reset on that computer. and scan for visuses again

May 24, 2013 | Computers & Internet

1 Answer

Our remote control got damp and no longer works. We tried to dry it with a hair dryer - no luck. where can we purchase another one? we tried a universal, but none of the codes for Prima worked. my email...


These are simple to take apart and you will need to do that to remove the keypad and dry the PCB and rubber feet at the back of the keypad. Do not use an abrasive cloth on the rubber or PCB, just dry it with a light lint rag and it should work fine.

Jan 12, 2010 | Prima CV1311 TV

1 Answer

Keypad not working


In lower part on the other side of PCB with player`s keys You can find 25-pin glass IC. Change it. It`s an usual EMI-filter the same as on the Main PCB z2400.

Jan 20, 2009 | Nokia 3250 Cellular Phone

1 Answer

My buttons wont work


i think the moisture has entered into the keypad sensor where it must have shorted the leads on the keypad board...
you should remove the keypad layer and make it dry thoroughly..
i would advise to take it to the service center for curing the keypad asap....if the phone is under warranty you can take it to the customer care

Jul 13, 2008 | Lands Phones

1 Answer

My Samsung G600 has stopped working


This would mean that at sometime your phone got wet by some form of liquid.I don't know if u could do this but the phone needs to be opened and your keypad needs to be lifted(the one on the pcb or main board) and cleaned thoroughly by a spirit solution that would evaporate and then replaced.you'll have to clean the pcb side and the contacts on the actual keypad and that should do the trick hopefully.try not to disturb the adhesive on the keypad because you would need to reseat when u r finish cleaning. thanks !

sam !

May 28, 2008 | Cell Phones

1 Answer

6220 keys 2,5,8,0 not function


no u have to change the glass ic

Nov 15, 2007 | Nokia N70 Cellular Phone

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