I had a problem on HP Probook 450 G2 Laptop. The charger indicator ( Orange light ) was blink. I checked 19V line and FETs Everything working fine. I replaced the charging IC BQ24736 by BQ24725 ( Checked Datasheet was Same ). But no use its doing the same. I check The DC/DC Converter ( 3V /5V). checked LDO 3V is ok. but on LDO 5V is showing 3.98V and the output coils( 3v/5v ) not showing and voltages. So i try to find the replacement for RT8243AZQW. But i couldn't find and finally i ordered it on ebay. after two days i got free time to check this again. I check all resistors and capacitors around RT8243AZQW chip. Finally i found PR321 ( 499K ) was opened. I replaced it now the laptop working fine.
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