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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Various > Siemens-Benq > NON Siemens Brand (ODM Phones)

NON Siemens Brand (ODM Phones) Do you know that C62 is not a Siemens Manufactured !? here in this section we Throw all non Siemens-Benq related Threads like C62, CFX65, SF65, CL75, CL50, S40, U15, C30,Xelibri.

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Old 05-24-2007, 17:12   #1 (permalink)
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EF81 blank LCD, PCB HD problem


hi.
have two EF81 wyth LCD problem - first, LCD work some times then go to gray. after some time agane work ok. Second - all time two LCD are grey.
I try use LCD modul and PCD from good phone and now I knou thet problem is in phone HD. LCD and flat cabels, conektors are ok.
thys two phones is totaly new, not used, no woterdamege, no drops.
I try rehot PCB but not helps.
Did somebody hav similar problem? Hove to fix it?
Thenks/
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Old 06-04-2007, 13:22   #2 (permalink)
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EF81 LSD Problem

Hello!
Have about 30-40 phones with same problem ... can't solve it.
Please, help me!
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Old 06-04-2007, 13:37   #3 (permalink)
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Hello !

There are many from this phones in the market !
I have 150 pieces of them !
All of them have blank display but works!
Sometimes i change a resistor and the display works !

The resistor is near the Battery Conector and is black!
On some Pieces this resistor is broken !

Sorry for my bad english !

WBR
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Old 06-06-2007, 02:14   #4 (permalink)
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Please. Those of EF81 without IMEI are not frozen.

Can someone check if u can write into memory?

Simple Test. "Firmwareupdate" :

Change SVN 58 into 59 or so... You need QXDM.

Memory Viewer (F4)

0x01BC3620 (adress varies, here from SVN 58 (IP16))

Code:
O'zapft is!000;EF81;58;KE_1433_17.0.16;P;
O'zapft is!000;EF81;59;KE_1433_17.0.16;P;
If it not Restart? Then Jackpot.

Example video attached. Thanx for trying.
Attached Files
File Type: rar Memory Viewer1.rar (21.3 KB, 57 views)

Last edited by adfree; 06-06-2007 at 13:07. Reason: mistype
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Old 06-06-2007, 09:09   #5 (permalink)
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Hi! I also bought one of them as back-up Try looking at the display from different angles, they DO display what they should but without backlights

Maybe you can tell us by referring to the pics in <http://www.ef81.com/Bilder.1472.0.ht..._lzgallery_pi1[showUid]=153> which resistor and how you changed it! This would be great and really of help!

Thankx a lot!
Quote:
Originally Posted by TeutoCenter View Post
Sometimes i change a resistor and the display works !

The resistor is near the Battery Conector and is black!
On some Pieces this resistor is broken !
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Old 06-13-2007, 19:40   #6 (permalink)
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Hello!
Please, anybody, explayn me which resistor shoul be replaced?
Thank you!
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Old 07-07-2007, 14:47   #7 (permalink)
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Quote:
Originally Posted by cooler_ua View Post
Hello!
Please, anybody, explayn me which resistor shoul be replaced?
Thank you!
look for broken one. In My case theris no broken resistors neear bat conector.
Pleas, meet me on ICQ, we can talk on native lng.
Steel no solution
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Old 07-13-2007, 11:11   #8 (permalink)
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I found out that sometimes a diode is even missing (in my case: V900 aka RB501V40 by ROHM Electronics).
These may be hard to find if you're not a phone manufacturer
Anyone having an idea where to get them in Germany?
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