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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > Nokia > Nokia Hardware & Hardware Repair

Nokia Hardware & Hardware Repair all what you need for Hardware Repairing for Nokia Phones. Before writing any thread here try to check the Frequently Asked Questions Section.

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Old 11-25-2006, 08:21   #1 (permalink)
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N70 , Chargint but not coming ON


hi guys..
I have one N70 which was water damage.. before... but after cleaning now the phone is charging but not switching ON.... can anybody please tell me how can i fix this problem.. thanks a lot
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Old 11-25-2006, 12:36   #2 (permalink)
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Quote:
Originally Posted by bakhshalvi007 View Post
hi guys..
I have one N70 which was water damage.. before... but after cleaning now the phone is charging but not switching ON.... can anybody please tell me how can i fix this problem.. thanks a lot

have you check on -off switch ?

try this,
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File Type: jpg N70 power on problem.jpg (111.5 KB, 660 views)
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Old 11-25-2006, 12:58   #3 (permalink)
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see schematic diagram... change the display i.c 100% working
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Old 11-25-2006, 13:25   #4 (permalink)
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cool answer nice solution.
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Old 11-25-2006, 17:51   #5 (permalink)
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Quote:
Originally Posted by bakhshalvi007 View Post
hi guys..
I have one N70 which was water damage.. before... but after cleaning now the phone is charging but not switching ON.... can anybody please tell me how can i fix this problem.. thanks a lot

http:///vbb/showth...68#post2106468


look at these schematics. i am sure that it can be helpfull.
good luck

yours respectfully
efrcom_ Lutfi Cagil
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Old 11-26-2006, 00:02   #6 (permalink)
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if all previous suggestions doesn't works then try to review the RETU IC by resoldering it & if not works then replace it ...

Last edited by mobilagy; 11-26-2006 at 00:47.
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Old 11-26-2006, 03:07   #7 (permalink)
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change the display i.c 100% working 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%100%100%100%100%100%100% 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%
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Old 11-26-2006, 06:16   #8 (permalink)
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Quote:
Originally Posted by asmabukh595 View Post
change the display i.c 100% working 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%100%100%100%100%100%100% 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%
hey man, hi is saying that "the phone doesn't power on" not "the phone is not displaying" , there is nothing to do with the display IC.

Last edited by mobilagy; 11-26-2006 at 07:19.
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Old 11-26-2006, 06:21   #9 (permalink)
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Quote:
Originally Posted by asmabukh595 View Post
change the display i.c 100% working 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%100%100%100%100%100%100% 100%100%100%100%100%100%100%100%100%100%100%100%10 0%100%100%100%100%100%100%
as i mentioned i think if it's not the power switch then it's RETU IC fault .

Last edited by mobilagy; 11-26-2006 at 07:18.
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Old 11-26-2006, 06:28   #10 (permalink)
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Quote:
Originally Posted by bakhshalvi007 View Post
hi guys..
I have one N70 which was water damage.. before... but after cleaning now the phone is charging but not switching ON.... can anybody please tell me how can i fix this problem.. thanks a lot
see the attachmint this is the 100% solution for your problem
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File Type: jpg n70 power ways.JPG (49.1 KB, 526 views)
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Old 11-26-2006, 07:40   #11 (permalink)
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Originally Posted by rana_sab View Post
see the attachmint this is the 100% solution for your problem
!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!
how could you said that !!!!!!!!!!!!!!!!!

trace the power on key track in the schematic diagram & find out where it goes, see in the picture, it goes directly to the RETU IC, there is no other ICs or filters on its way but the R4406
with the GND,so how come you said that !!!!!!!!!!!!


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Old 12-04-2006, 04:43   #12 (permalink)
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Originally Posted by rana_sab View Post
see the attachmint this is the 100% solution for your problem
well, i have checked the measurement between the power switch & the point mentioned in your attached picture & i realized that the two points has a connectivity with resistance but i don't know how due to the schematic diagram that i mentioned !!!
may be it differ for some boards design.
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Old 12-06-2006, 11:09   #13 (permalink)
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for n70 the power switch filter has been integreated in LCD IC if u change it it work perfectly
i repaired a new one with a same problem
......
if u want to repaire it .....
u must test
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Old 12-07-2006, 10:31   #14 (permalink)
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anyone have solution to N70 offline problem without changing sim ic and i am looking for N70 diagram thanks
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Old 12-07-2006, 16:21   #15 (permalink)
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Quote:
Originally Posted by rana_sab View Post
see the attachmint this is the 100% solution for your problem
Do we remove the glass ic and from the 2nd point we link a wire to the power switch? And do we link to the left or right hand side of the power switch???
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