- The model we looked at was running the latest Android 8.1 Oreo software. It also uses Asus’ own ROG Gaming UI interface that looks very appropriate for the style of the phone.Overall, it appears to be fairly stock Android even though it looks quite different due to the elements like icon pack. There doesn’t seem to be much bloatware, although this can change by the time the device launches, especially via networks.
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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
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.