I am a kind of begginer in mobile phone repairing.I just got a nokia 150 keypad.custermer says battery drops quickly.so i turned on the phone with my DC power supply and it turns on normally. But it takes constant 70mA current even when the display light off.Is there any solutions to try.please help me..
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Look for any areas of the board that are abnormally warm, you could use a cotton swab with isopropyl alcohol for this or potentially a thermal camera if you have one. It may not be a huge difference thanks to the low current, but if you leave it on for a while it may become more apparent. @keshi
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