3310 with light problems!!! - GSM-Forum

sergioems · 08-28-2002, 16:00

i have there a 3310 that when i put batery on it, even with phone off the four leds of display are always light on. what should i replace it to correct this problem? please reply me
thanks in adavance

Abe · 08-29-2002, 06:14

Replace the only IC on the pcb that is outside of the metal protection.....
Its located on the lower right side of the pcb,black,and its 20 pin IC....its written NMP......... on it........
Work 100%..........

willy · 08-29-2002, 07:04

sergioems

<center><A href="http://imagehost.auctionwatch.com/bin/viewimage.x/00000000/demetan1/3310dig1.jpg"><img src="http://imagehost.auctionwatch.com/bin/imageserver.x/00000000/demetan1/.mids/3310dig1.jpg" 
Click image to view larger version</A></center>
Upper show to you where is N400 !

<center><A href="http://imagehost.auctionwatch.com/bin/viewimage.x/00000000/demetan1/N400_led.jpg"><img src="http://imagehost.auctionwatch.com/bin/imageserver.x/00000000/demetan1/.mids/N400_led.jpg" 
Click image to view larger version</A></center>
Here, you have to also check R407 and R406,, is it short to GND !

Willy

Quote:

Originally posted by Abe
Replace the only IC on the pcb that is outside of the metal protection.....
Its located on the lower right side of the pcb,black,and its 20 pin IC....its written NMP......... on it........
Work 100%..........

EGYGSM-TEAM · 09-01-2002, 18:57

Hi sergioems
if Abe and willy solution dont work,
try to flash phon somtimes it's doing that and the key no:1 dont work
goodluck
wesam

george gsm · 09-01-2002, 22:51

hello friends,
usualy when the ic n400 is broken, light is on just in top, at display not in rest.
geo

willy · 09-01-2002, 23:06

Wesam,

as member george gsm said:" even with phone off the four leds of display are always light on."

Is it flash phone will work ?
i do not think so

it must be HW problem, not SW !

Willy

Quote:

Originally posted by wesam
Hi sergioems
if Abe and willy solution dont work,
try to flash phon somtimes it's doing that and the key no:1 dont work
goodluck
wesam

EGYGSM-TEAM · 09-02-2002, 00:47

I'm shure that your experince is very big than me and i'm happy to learn from you .
i tried to flash more than one phon was with 4 leds light and it's sucssesifull
thank's
Wesam

.::AkhavanGSM::. · 09-02-2002, 17:26

I also agree with willy. It can be caused by water damages.
Also I think wesam is right.
I had a 3310 wich was dead.I flash and it bacame alive,but no 1 did not work.
I thought it was HW but after reflashing the phone , the problem was solved.
I am waiting for other answers.
GOOD luck LIGHT

willy · 09-02-2002, 17:43

Hello GSM Light,

thanks !

of casue, we have to make sure, that phone SW has no problem,, then we go HW !

Is it any 3310 or NOKIA phone ,, just put battery, without switch it on,, and phone will have 4 led light up ?

Willy

Quote:

Originally posted by GSMLight
I also agree with willy. It can be caused by water damages.
Also I think wesam is right.
I had a 3310 wich was dead.I flash and it bacame alive,but no 1 did not work.
I thought it was HW but after reflashing the phone , the problem was solved.
I am waiting for other answers.
GOOD luck LIGHT

CellM@n · 09-02-2002, 21:26

have tried once and succeed, change ur flash ic.

fiZ · 10-26-2002, 10:32

i have the same problem,i changed N400 but leds under displey are shine even if phone is switch off,keypad leds works ok

b0ba · 10-26-2002, 12:53

I'm 10000% agry with Willy! Just look at the schematics!!!
Tottaly imposible that lights could lit on sw problem unless MCU hangs. But If phone turns on

.
I'm 100000n% sure that it is hardware failure. N400 has two inputs LCDLED and KBDLED that are interconnected. Only if you have potential more then 0.7v on those pins the LEDs should lit.

WBR B0BA

sjakie · 08-06-2004, 01:29

Hi, has same problem.
4 leds lcd burn with phone turned off, changend N400 same.
removed R406 and all is ok.

Whats function off R406, i see no difference after removing it.
All is ok.

Thanks
Sjakie

Cat10 · 08-06-2004, 08:24

The function of R406 and R407 is of regulating the light of the LED's.

sjakie · 08-06-2004, 13:10

Hi, thanks for reply.

Its strange that without R406 its working ok?

Regards
Sjakie

08-28-2002, 16:00	#1 (permalink)
sergioems No Life Poster Join Date: Feb 2002 Location: Portugal- Center of Europe Age: 42 Posts: 1,244 Member: 9502 Status: Offline Thanks Meter: 9	3310 with light problems!!! i have there a 3310 that when i put batery on it, even with phone off the four leds of display are always light on. what should i replace it to correct this problem? please reply me thanks in adavance Last edited by willy; 08-29-2002 at 06:19.

09-02-2002, 00:47	#7 (permalink)
EGYGSM-TEAM Insane Poster Join Date: Jul 2002 Location: Egypt Age: 45 Posts: 98 Member: 14194 Status: Offline Thanks Meter: 4	Dear Willy I'm shure that your experince is very big than me and i'm happy to learn from you . i tried to flash more than one phon was with 4 leds light and it's sucssesifull thank's Wesam

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08-29-2002, 06:14	#2 (permalink)
Abe No Life Poster Join Date: Apr 2001 Location: Croatia Age: 45 Posts: 1,114 Member: 4185 Status: Offline Thanks Meter: 3	Replace the only IC on the pcb that is outside of the metal protection..... Its located on the lower right side of the pcb,black,and its 20 pin IC....its written NMP......... on it........ Work 100%..........

09-01-2002, 18:57	#4 (permalink)
EGYGSM-TEAM Insane Poster Join Date: Jul 2002 Location: Egypt Age: 45 Posts: 98 Member: 14194 Status: Offline Thanks Meter: 4	Hi sergioems if Abe and willy solution dont work, try to flash phon somtimes it's doing that and the key no:1 dont work goodluck wesam

09-01-2002, 22:51	#5 (permalink)
george gsm No Life Poster Join Date: Jul 2002 Location: Bucharest-Romania Age: 51 Posts: 1,160 Member: 14200 Status: Offline Sonork: Sonork id Thanks Meter: 117	hello friends, usualy when the ic n400 is broken, light is on just in top, at display not in rest. geo

09-02-2002, 17:26	#8 (permalink)
.::AkhavanGSM::. No Life Poster Join Date: Jun 2002 Location: Iran Age: 47 Posts: 1,082 Member: 12724 Status: Offline Thanks Meter: 30	I also agree with willy. It can be caused by water damages. Also I think wesam is right. I had a 3310 wich was dead.I flash and it bacame alive,but no 1 did not work. I thought it was HW but after reflashing the phone , the problem was solved. I am waiting for other answers. GOOD luck LIGHT

09-02-2002, 21:26	#10 (permalink)
CellM@n No Life Poster Join Date: Feb 2001 Location: Planet EARTH Age: 50 Posts: 1,209 Member: 3194 Status: Offline Thanks Meter: 41	have tried once and succeed, change ur flash ic.

10-26-2002, 10:32	#11 (permalink)
fiZ Registered User Join Date: Feb 2002 Location: nokia Age: 48 Posts: 204 Member: 9626 Status: Offline Thanks Meter: 0	i have the same problem,i changed N400 but leds under displey are shine even if phone is switch off,keypad leds works ok

10-26-2002, 12:53	#12 (permalink)
b0ba No Life Poster Join Date: Oct 2001 Location: No route to host. Age: 44 Posts: 895 Member: 6772 Status: Offline Thanks Meter: 17	I'm 10000% agry with Willy! Just look at the schematics!!! Tottaly imposible that lights could lit on sw problem unless MCU hangs. But If phone turns on . I'm 100000n% sure that it is hardware failure. N400 has two inputs LCDLED and KBDLED that are interconnected. Only if you have potential more then 0.7v on those pins the LEDs should lit. WBR B0BA

08-06-2004, 01:29	#13 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	Hi, has same problem. 4 leds lcd burn with phone turned off, changend N400 same. removed R406 and all is ok. Whats function off R406, i see no difference after removing it. All is ok. Thanks Sjakie

08-06-2004, 08:24	#14 (permalink)
Cat10 Freak Poster Join Date: Oct 2003 Location: Italy Age: 45 Posts: 220 Member: 42123 Status: Offline Thanks Meter: 2	The function of R406 and R407 is of regulating the light of the LED's.

08-06-2004, 13:10	#15 (permalink)
sjakie No Life Poster Join Date: Jan 2000 Location: NL Age: 55 Posts: 1,380 Member: 847 Status: Offline Thanks Meter: 36	Hi, thanks for reply. Its strange that without R406 its working ok? Regards Sjakie