nokia phones with network+full signal then NO SIGNAL AND NO NETWORK NAME .!! - GSM-Forum

makona · 03-30-2001, 04:57

hi friends ,
i got this problem alot , itsn't HW problem ,
i got this with some 8210 , 8850 after removing contact service with eeprom sec checksum FAILD .
- and some other phones 6150 ,3310 .. from customers ...

the phone maybe do it if flashed with wrong ppm or firmware or eeprom .. but everything am sure is ok .. WHY THAT HAPPEN ??

* i can see NETWORK NAME WITH FULL SIGNAL THEN IN SECOUNDS NO-netowrk and no-signal *

p.s : alot in 8210's ....

solution ?

best regards

beltz · 07-15-2002, 16:23

the same thing is happening to my phone changed the PA
Saw filter
still the same please help

projectalpha · 07-15-2002, 18:00

did you update the faid?

or, it is possible that the antenna connector has a loose contact.

it is useful to activate netmonitor and under test 01 you can see if the phone is searching for a network. when the signal is very low (a value of 100 up in netmon) the signal level drops.

a netmonitor manual would be helpful in this situation.

beltz · 07-16-2002, 07:03

i hot air guned the cobba, ccont2i and the hagar NMP
now the reception lats three times the length it used to
but still dropes out i'm starting to give up
as i have changed half of the modules in the phone
i'm sussing that there is a microscopic crack on the circuit.

but thanx for your tip anyways
how did you go with your phones

Damuho · 07-16-2002, 08:31

hi. b4 doing anyting in the hardware, you must be sure that the software is ok. If you repaird a contact service unit and after doing it you will get a full signal and drop after a few secs. Try this:
1.flash the mcu+ppm+eeprom and after that use
2.knok-phoenix to change imei and quick set faid and use
3.Nk profiles to set default. When using nk profile when you click the set defaults all the button must blink.
Hope it works if not try changing the 36mhz crystal osc and PA.(for 3310,82xx & 8850)

Good luck.....

gorandj · 07-20-2002, 05:35

flash nokia virgin eprom then use nk_calc from dejan and that`s it! works 100%

hotraj · 07-20-2002, 06:48

It is best to use a liquid flux when you reheat any board.
This helps the solder to flow in areas where there are dry joints.

There is a flux available from CPC Electronics

vule · 07-22-2002, 15:13

GUYS !!!

Do not reheat any components ! Bigger chance is that u will **** them than fix them..

Take it off , make new balls ( or use new component with factory made balls - best solution ) and solder it back.

Flash good firmware+virgin eeprom, restore original IMEI, recalculate simlock data and FAID ( with eeprom tools ) and then use REPAIR IMEI option in eeprom tools ( very important ).

If failure remains use wintesla: file - open - NHM5 ( for 3310, just example ) - RF controls ...

Check TX radio button on window appeared, select TX power level 5 instead of BASE, click apply and close ur phone to monitor ( u should see distortion on screen of monitor if PA, antenna switch and cobba are OK.

If still no RF signal it could be 26 MHz clock or something else..

U can use this procedure for diagnostic also...

As u can see no NOKIA expensive equipment involved LOL

BR

Vule

beltz · 07-22-2002, 15:20

THANKS GUY FOR ALL YOUR RESPONSES.

I DID NOT GET A CHANCE TO TRY IT YET, A WILL LET YOU KNOW IF I SUCCEED

CHEERS

03-30-2001, 04:57	#1 (permalink)
makona No Life Poster Join Date: Nov 2000 Location: EGYPT Age: 44 Posts: 1,202 Member: 2583 Status: Offline Sonork: 100.88702 Thanks Meter: 203	nokia phones with network+full signal then NO SIGNAL AND NO NETWORK NAME .!! hi friends , i got this problem alot , itsn't HW problem , i got this with some 8210 , 8850 after removing contact service with eeprom sec checksum FAILD . - and some other phones 6150 ,3310 .. from customers ... the phone maybe do it if flashed with wrong ppm or firmware or eeprom .. but everything am sure is ok .. WHY THAT HAPPEN ?? * i can see NETWORK NAME WITH FULL SIGNAL THEN IN SECOUNDS NO-netowrk and no-signal * p.s : alot in 8210's .... solution ? best regards

07-15-2002, 16:23	#2 (permalink)
beltz Junior Member Join Date: Apr 2002 Location: melbourne Age: 44 Posts: 11 Member: 11017 Status: Offline Thanks Meter: 2	i have the same pb the same thing is happening to my phone changed the PA Saw filter still the same please help

07-16-2002, 07:03	#4 (permalink)
beltz Junior Member Join Date: Apr 2002 Location: melbourne Age: 44 Posts: 11 Member: 11017 Status: Offline Thanks Meter: 2	hot air gun i hot air guned the cobba, ccont2i and the hagar NMP now the reception lats three times the length it used to but still dropes out i'm starting to give up as i have changed half of the modules in the phone i'm sussing that there is a microscopic crack on the circuit. but thanx for your tip anyways how did you go with your phones

07-20-2002, 06:48	#7 (permalink)
hotraj Junior Member Join Date: Dec 2001 Location: Nottingham Posts: 20 Member: 8095 Status: Offline Thanks Meter: 0	Reheating boards It is best to use a liquid flux when you reheat any board. This helps the solder to flow in areas where there are dry joints. There is a flux available from CPC Electronics

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07-15-2002, 18:00	#3 (permalink)
projectalpha Junior Member Join Date: May 2002 Posts: 17 Member: 12212 Status: Offline Thanks Meter: 0	did you update the faid? or, it is possible that the antenna connector has a loose contact. it is useful to activate netmonitor and under test 01 you can see if the phone is searching for a network. when the signal is very low (a value of 100 up in netmon) the signal level drops. a netmonitor manual would be helpful in this situation.

07-16-2002, 08:31	#5 (permalink)
Damuho Major Poster Join Date: May 2002 Location: Philippines Age: 51 Posts: 48 Member: 11729 Status: Offline Thanks Meter: 0	hi. b4 doing anyting in the hardware, you must be sure that the software is ok. If you repaird a contact service unit and after doing it you will get a full signal and drop after a few secs. Try this: 1.flash the mcu+ppm+eeprom and after that use 2.knok-phoenix to change imei and quick set faid and use 3.Nk profiles to set default. When using nk profile when you click the set defaults all the button must blink. Hope it works if not try changing the 36mhz crystal osc and PA.(for 3310,82xx & 8850) Good luck.....

07-20-2002, 05:35	#6 (permalink)
gorandj Freak Poster Join Date: Jun 2002 Location: earth Age: 53 Posts: 168 Member: 13303 Status: Offline Thanks Meter: 11	flash nokia virgin eprom then use nk_calc from dejan and that`s it! works 100%

07-22-2002, 15:13	#8 (permalink)
vule No Life Poster Join Date: Apr 2002 Location: Radiometer Medical ApSBrønshøj Age: 51 Posts: 721 Member: 10854 Status: Offline Sonork: 1578988 Thanks Meter: 3	GUYS !!! Do not reheat any components ! Bigger chance is that u will **** them than fix them.. Take it off , make new balls ( or use new component with factory made balls - best solution ) and solder it back. Flash good firmware+virgin eeprom, restore original IMEI, recalculate simlock data and FAID ( with eeprom tools ) and then use REPAIR IMEI option in eeprom tools ( very important ). If failure remains use wintesla: file - open - NHM5 ( for 3310, just example ) - RF controls ... Check TX radio button on window appeared, select TX power level 5 instead of BASE, click apply and close ur phone to monitor ( u should see distortion on screen of monitor if PA, antenna switch and cobba are OK. If still no RF signal it could be 26 MHz clock or something else.. U can use this procedure for diagnostic also... As u can see no NOKIA expensive equipment involved LOL BR Vule

07-22-2002, 15:20	#9 (permalink)
beltz Junior Member Join Date: Apr 2002 Location: melbourne Age: 44 Posts: 11 Member: 11017 Status: Offline Thanks Meter: 2	THANKS GUY FOR ALL YOUR RESPONSES. I DID NOT GET A CHANCE TO TRY IT YET, A WILL LET YOU KNOW IF I SUCCEED CHEERS