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Minggu, 16 Maret 2014

Nokia N97 Qwerty Keypad Keys Backlight LED failure solution

Nokia N97 Qwerty Keypad Keys Backlight LED failure solution - do you know that every day there are new gadgets that are created with new advantages to simplify your life, on the blog Computers News we will discuss about the latest gadgets and gadgets that have long ranging from speck and price, now we will discuss about Nokia N97 Qwerty Keypad Keys Backlight LED failure solution we have collected a lot of news to make this article to be really useful for you, please see.

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Nokia N97 Qwerty Keypad Keys Backlight LED failure solution

Here's a solution for Nokia N97 backlight LED on the QWERTY keys not working or failed to light up.
This solution can be used if the keypad membrane flex is not damaged but the LED backlight still won't light up.


Nokia N97 Backlight LED Not Working Solution
nokia n97 backlight LED not working solution
The solution above shows the qwerty keypad backlight LED circuit, it is composed of LED driver IC and filtering Resistors. These Resistors has a 0 ohms resistance value, you may check first these resistors before troubleshooting  further.
The LED driver needs the Battery Voltage which is 3.7 volts that came across with red color highlighted component Resistor, check that voltage and continuity to the battery B+ terminal.
If all the Resistors were okay, you may then proceed to check or replace the LED Driver IC.



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