Nokia C5 - The Redmi 4A is ageing, and yet it remains a very good budget phone and a decent all-rounder under £100. Though it lacks more modern aspects such as a fingerprint scanner, metal build and 18:9 display, it's almost impossible to argue at this price. The 4A has since been succeeded by the 5A, but there's really no difference in core specification, making this an even better deal if you can find it at a rock-bottom price. The Global model is recommended, provided you're happy to get along with MIUI 8.5.
of other areas where phones, well we have collected a lot of data from the field directly and from many other blogs so very complete his discussion here about Nokia C5, on this blog we also have to provide the latest automotive information from all the brands associated with the automobile. ok please continue reading:
Here's a solution that may
work to solve Nokia C5 keypad malfunction or not responding.
This solution may help as a guide to repair certain keys that does not
working when being pressed. If the device suffered wet or
water damaged or any means of liquid most oftentimes that keypad may stop working due to some
short circuit occurred and or oxidation may build up due to
a liquid residues.
If this happens you may need to clean first the
keypad membrane and contact pads using a liquid cleaner.
If all the keypad keys already been cleaned but still there are particular key may still not work, you can used the solution below to trace that particular and check if the
connection line paths is not open or cut-off.
Nokia C5 keypad not responding - connection tracing repair solution
The keypad
circuit of Nokia C5 used to EMI-ESD filter IC's and mounted near to the keypad pin connector.
There are some factors that this keypad filter IC will breakdown or become faulty due to excessive electrostatic discharge and electromagnetic interference.
Hints for troubleshooting Nokia C5 keypad malfunction:a) Clean the keypad membrane and contact pads.
b) Check the keypad flex wire if damaged, you may need to replaced the whole keypad flex matrix if the flex is already damaged.
c) Identify which particular keys were not working, then trace its connection between the other keys. If all of the keys connected in the same line paths are not working and the flex is okay, you may then suspects the problem lies on the keypad filter IC.
d) Replace the keypad filter IC.