DELL N4110 CHARGING ISSUE
Posted: Thu Dec 22, 2016 8:00 am
PROBLEM: The laptop doesnt give any adapter warnings. Shows Plugged in Charging but doesnt charge.
Checked all mosfets in the charging section. Found 4435bz mosfets all ok.
Next checked ISL88731(PU1) pinouts. On pin 24(DHI) it shows 9.9 V and on pin 25{Pgood) it shows 9.9v which is wrong.
The powergood volatage should be 15.7 and DHI volatage should be 13.0v.
Probed further and traced that pin24 od ISL88731 is connected to mosfet7410(PQ33). This mosfet found faulty.
Replaced with mosfet 8065 and now getting 15.78 at pin 25 of Charging IC.
Case solved.
Checked all mosfets in the charging section. Found 4435bz mosfets all ok.
Next checked ISL88731(PU1) pinouts. On pin 24(DHI) it shows 9.9 V and on pin 25{Pgood) it shows 9.9v which is wrong.
The powergood volatage should be 15.7 and DHI volatage should be 13.0v.
Probed further and traced that pin24 od ISL88731 is connected to mosfet7410(PQ33). This mosfet found faulty.
Replaced with mosfet 8065 and now getting 15.78 at pin 25 of Charging IC.
Case solved.