Battery not charging - Dell Inspiron 3593 FD155 LA-JO81P (REV 1.0) (A00)

[mon2]

Remove all power. No battery as well.

Meter in diode mode. Red meter probe on the pin #3 of the dual diode @ PQB01. Black meter probe on pin # 1 of this diode. The meter should conduct. What is the voltage (in diode mode)?

Now reverse the meter leads with black on pin # 3; red on pin # 1. Meter should block. Confirm this.

Then perform the same test using pins # 2 and pin # 1. We are checking if this dual diode is leaky. If yes, this dual diode must be replaced. We cannot have the battery voltage feeding back onto the adapter voltage and vice-versa. Respectively, the battery voltage on its own should be able to power the board but it could be that the battery voltage is too low.

[lawrenceptrini]

Is it dual diode PDB01?

[lawrenceptrini]

In relation to schematic, placing red probe on battery feed pin (#3) and the other on cathode (pin 1) it reads 0.312v
Placing the probes the other way around yields OL or it blocks.

Same readings on adapter pin to cathode.

[mon2]

Yes. Ok. The dual diode is not defective based on these checks.

[lawrenceptrini]

Yes, I agree and when the battery had good charge it did indeed boot and run the laptop
normally. However, when it ran low it's not recharging......So a charged battery will run the laptop fine
but the system will not charge battery.

[lawrenceptrini]

Laptop boots to this message: "Alert! The AC power adapter wattage and type cannot be determined. The battery may not charge. The system with adjust the performance to match the power available. Note: This warning can be disabled in BIOS setup". There are options to go to Bios, run Diagnostics or continue to windows.

[mon2]

Ok. Measure the voltage to ground on PL3 (either side). The issue is that the PSID line is not working. There is an ID chip inside your Dell power supply. Be 100% sure that you are using the Dell brand only power supply. That ID chip is powered from this PSID line.

Confirm that your Dell brand power supply has the needle like pin in the center of the power adapter connector. This is the PSID pin.

Post your measurement.

[lawrenceptrini]

Hi Thanks,

With AC Adapter only plugged in, voltage to ground on both sides of PL3= 3.298v

[lawrenceptrini]

The Dell AC Adapter has the middle pin and Dell logo.

N.B. I will see if I can somehow get my hands on a working original Dell adapter tomorrow to test originality.

[mcplslg123]

OMG, after 60+ posts Op discloses that adapter is not recognised which is avery common problem in Dell.

[lawrenceptrini]

mon2 Thank you, appreciate your effort.

[lawrenceptrini]

mon2
Hi, so after the owner of the laptop re-affirmed me that the AC Adapter is indeed the original genuine adapter that
came with the laptop, I was finally able to get my hands on another genuine Dell Ac Adapter.

When I plugged it in, the laptop booted up to the login screen. I restarted and went to the Bios screen where
it stated the AC Adapter as 45W.

So the windows message 'Adapter power and wattage cannot be determined' is no longer present and the Bios went from
'AC Adapter not installed' to AC Adapter 45W.

I restarted the laptop, log into windows and noticed the battery percentage increasing, so battery was being charged. I made some errands and returned to see the battery charged to 78%. I removed the AC Adapter and 7hrs
left alone the percentage was 58%. When it reached 19% I plugged in the AC Adapter and the battery is not being charged anymore, it reduces percentage if the Adapter is removed but stays the same percentage if Adapter is plugged in.

[rogfanther]

If the original adapter was 65W ( or bigger ) , then a 45W one will be enough to only keep the machine on. Maybe now you have some energy option disabled, so that it doesn´t have enough power to both keep the machine running and charge the battery. Try shutting down the notebook, and after some time see ( in bios, if possible ) if the battery charge has increased.

Anyway, look for an adapter with the correct rating for this machine.

[lawrenceptrini]

Ok thanks, will do as suggested and report

[mon2]

Good and agreed. The Dell website reports that you need a 65W (or higher) Dell power adapter to power this unit.

See the compatibility list here:

Dell 65W 4.5mm AC Adapter | Dell Canada

[lawrenceptrini]

mon2
Hi, thank you.....appreciate your input.
Will check out the link.

[lawrenceptrini]

mon2 Thanks for your assistance.....all is well with the laptop