Please Mr. Willy or someone help with this Nokia's
 

Can someone give me advice here,I have 4 Nokias here 2pcs 3310 and 2pcs 8210 with same problem.When you power up phone network is there untill lights go off.
But I think that losing network after lights go off it's not related to each other,because if I press any key when phone have network,lights stays but network is gone.

I try software update flash(mcu+ppm),eeprom....
I changed PA,antena switch and cobba.
I reflow cobba,ccont,hagar,flash,ram...
I also changed battery.


There is one thing that I notice when any of this phone is powering there is no sound in computer speakers if phone is near them(if you understand me).


Many thanks in advance.

ok, for people who read your question and get confused, your fault is...
Power phone is, it gets signal, after few seconds (5-6 seconds) you lose signal..

Ok, in my view i NEVER reflow, if i did, i'd be sacked. lol
Have you tried changing the TCXO (26Mhz Crystal)....Ive encountered many of these problems before on the 3310, if that still didn't fix it, change the HAGAR..

Thanks

Ok thanks for your reply I will try this tomorow.