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View Full Version : Help! Led changing coz phone Dead!!!



jdx1883
04-10-2002, 09:45 PM
hi..to all nokia technicians expert...i am newbie on gsm hardware...recently i have change a 3310 led and 8250 led...but unfortunately...my phone was dead..........and cannot turn on!!! pls can somebody kindly help me!!!!! thank u very much!

vanshe12
05-10-2002, 03:34 AM
Try to remove all the leds you just install then try to reheat the board using hot air, trace all the leds you just put to your board then try to clean them. You can make it :) learning is not that easy m8

jdx1883
07-10-2002, 10:03 PM
@vanshe12
thanks u for ur help..!!!!!!
i will try it....

gorandj
08-10-2002, 01:49 PM
on 3310 led`s are near cpu so you must be extremly carefull i killed 2x3310 that way

jdx1883
08-10-2002, 02:19 PM
@gorandj
thank to remind me....

@vanshe12
i have remove all the led and clean the pcb wif thinner and reheat the board ...but seem like it is still the same!!!


Does any nokia expert mind to help me???????????

gorandj
08-10-2002, 03:07 PM
check if all elements are on their place

NokiaFX
08-10-2002, 10:55 PM
Check no components around the leds have been damaged or removed... also check you havent dropped any solder on the PCB, ive had a few phones come to me where people have done this to their phones after opting for home fitting :)

jdx1883
10-10-2002, 05:21 AM
@nokiaFX
@gorandj
thank for ur help...i will try to check it...

wings
11-10-2002, 01:11 AM
if there was no damadge to the bord flash it cause some times it loses the software

dio
11-10-2002, 08:46 PM
@jdx1883

try this

for the LED below the CPU, there is small 2 component that look the same, just below the LED, check that you have not move them accidently.

gorandj
11-10-2002, 09:53 PM
dio you are right i did it once....

jdx1883
12-10-2002, 01:27 PM
thank u for all ur help....now my 3310 have ok now...may i know wat abt my 8250???? i have done all the thing mention above but still the same....thank u

markchee
25-10-2002, 05:40 PM
You migth already hurts the cpu,ccont or ram,just behind the key pad leds.If you have over heated it.did you?


sincerely
mark

jdx1883
25-10-2002, 08:20 PM
@markchee
thank u...but i didn't heated my pcb.....

markchee
25-10-2002, 08:39 PM
Originally posted by jdx1883
@markchee
thank u...but i didn't heated my pcb.....


Have you ground yourself,during operating?try uses the charger to power up.You need an anti-static solder,do you know that?


sincerely
mark

jdx1883
26-10-2002, 08:31 PM
@markchee
i have try all u have say..i think may be is a Ccont problem....thank u very much..

InkdieMode
29-10-2002, 08:44 AM
ask ulous about it he is great in changing leds maybe he can help u..

wesam
29-10-2002, 11:21 AM
hi
did you try to flash your phone if you dont try it
if not working then remove the big capacitor right of the ccont and try
if not working try to chang you ccont
please send result
Wesam

ulous
29-10-2002, 01:49 PM
Hello Mate,
Use regulated power supply set to 3.6v then supply to your phone see if the Amps meter will deflect to Max if it is, you have a shorted lines check all your LED terminal for possible bridging of soldering lead to other parts then clean. if your phone still won't power on, use schematic check Vbb,Vcxo, Vcp, & Vsync around your power IC If their is no output voltage then change your power IC may be you damaged it...

Thx....:D :grin: :-D

FatLadZ
09-11-2002, 09:50 AM
check to make sure your screen leds arent shorting out.
as shorting stops the phone from booting up.
also check battery
and contacts
cheers
fatz

markchee
09-11-2002, 06:37 PM
Originally posted by jdx1883
@markchee
thank u...but i didn't heated my pcb.....


Remove all the LEDS,then flash the phone.If it cure,refit it.



sincerely
mark

wings
09-11-2002, 11:11 PM
markchee

heheheheh your the best thats a one month old thread looooooooool
:D :D :D :D
regards wings

Matique
19-11-2002, 03:05 PM
Now its even longer hehehehehe