HP probook 4440s not work on adapter

[reizal]

hi all,
today i have one hp probook 4440s not working in adapter, just working on battery, remove the battery plug in the charger just blinking led (white) 1x but not won,
plugin the battery N charger blinking led (white) 10x laptop on but not charging not issu nothing, someone can help me?

[George Ortiz]

Re: HP probook 4440s not work on adapter

Here's the link for the Probook 4440s service and information manual.
http://h20565.www2.hp.com/portal/sit...tte.cachetoken

Sorry for being so long, but this is the info you need to look at

[etronico2006]

Re: HP probook 4440s not work on adapter

I had the same problem and found the solution.
In my case, the first PU4001 mosfet transistor did not conduct, the one who biases the gate is the voltage divider made up of PR4003 and PR4006. The Gate of PU4001 was reaching 19.1 volts.
PR4003 if it measured 200Kohm, the 19V went through the PC4001 capacitor (the culprit) that did not average short but was on the run. I replaced it and the problem was fixed. Greetings from Ecuador.