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If you have a Nokia 100 Dead problem and it can not be switch on power on with battery but can be on with dc power supply then you can try this solution. look at the diagram given bellow in this post.
Nokia 5230 charging not support solution tested 

Nokia 100 Ringer Problem Solution Jumper Ways

You can see two red box in picture one of them is showing text remove so remove that resistance and other one you have to replace. check battery terminals also because in some cases it can be water damage or carbon on it.
So if you see some carbon or rust then clean the board and battery terminals with electronics cleaner and dry for a few mints with hot air or under electrical bulb.
for more detail and new tips and tricks about cellphone service problem keep visiting this page we will update cellphone service diagrams timely with new cellphone diagrams.some related post are also given bellow you can read them also for more information about cellphone.

History : No signal at all..






Tools:


Analog Multimeter
Soldering Iron
Tweezer
Sol lead
copper wire


Actions taken:


Common sense ive seen the PA side that there is a corroded so i realize that maybe pa B+ supply was missing so itrace using analog tester and bingo i find it..


Finish product: