Technical Support Dell latitude 7280 not charging

[Didam Power]

hello i need your help if possible i got a dell latitude 7280 it is not charging it does not have any short in it
dell latitude 7280
CAZ10 LA-E121P
Rev : 1.0 ( A00 ) 2016-12-23

 

[Ahmad Safari]

Hi
If I do not misunderstand. The laptop does not charge.ok?

Have you tried with other batteries and chargers?

if yes=>You first get voltage from the battery socket in two modes without battery and with battery.

Usually on the battery socket we have the supply voltage - data - clock - detector or rtc.
Which have data, clock and rtc voltage of 3.3 volts.
The detector is reduced from 3.3 volts to zero volts by inserting the battery.

The power supply also varies with the voltage of the battery. With the insertion of the battery sometimes increases and sometimes decreases.

 

[Didam Power]

thank you for instruction i have tested this method i have found the problem but the maim problem is when i change the chip after 2 days it create the same problem
the chip i have marked on mother board must have 100 om but after 2 days it gives ( 75 to 85 ) om

 

[Hosein Asadolahi]

thank you for instruction i have tested this method i have found the problem but the maim problem is when i change the chip after 2 days it create the same problem
the chip i have marked on mother board must have 100 om but after 2 days it gives ( 75 to 85 ) om

replace that resistors and test again . i suggest you change pd1 also . this resistor just pull up the pbat_pres# signal with 3.3always .