Hp dv6000 no power

[goodbrethen]

Hello guys, i have dv6000 at3 mainboard, the laptop has no power. i check the VIN there is no output.I already replaced the charging IC Maxim 8724E still no VIN, i check all the PIN except PIN11-ACOK# no voltage, can somebody help me because im new chip level repairing.. I hope somebody can help to fixed this problem..thanks..

[opamp]

Re: Hp dv6000 no power

First make sure the power adapter is working properly then check for 3 and 5 volts always on then check for voltage on the power button. Voltage should drop to zero volts when you press it.

[goodbrethen]

Re: Hp dv6000 no power

First make sure the power adapter is working properly then check for 3 and 5 volts always on then check for voltage on the power button. Voltage should drop to zero volts when you press it.

How possible to get 3 and 5 volts when VIN has no voltage, this is between the dc jack to PQ1 mosfet and L1 inductor which provide voltage to 3 and 5v. By the way i tried to used battery and it worked with battery not on ac adapter. My ac adapter is working properly.I replace all mosfet around the charging ic but still no VIN out. one problem I check the voltage gate at PIN4 in mosfet PQ3 there is 2v and on resistor PR182-4v PR183-30v and in charging IC pin11 ACOK-0v. here i provide a schematic diagram..

[opamp]

Re: Hp dv6000 no power

Check page 42 of your schematic start troubleshooting here. That ic max8724 is for charging the battery.

[siddiq]

Re: Hp dv6000 no power

Change PQ62 and let's see if it solves your problem.

[goodbrethen]

Re: Hp dv6000 no power

Change PQ62 and let's see if it solves your problem.

I already change the mosfet PQ62 but still no VIN out, a measure the voltage the pins of PQ2 pin1-19V, Pin 2,4,5,6-4v, i measure the voltage across the of PD20 -pin1-19V, PIN2-2V but the voltage across Pin is came from VH28 which is 30V

[siddiq]

Re: Hp dv6000 no power

Try changing PQ40 if you haven't done so already.

[goodbrethen]

Re: Hp dv6000 no power

[QUOTE=siddiq;296604]Try changing PQ40 if you haven't done so already.[/QUOTE

i've done already, now my problem is pin10 of the charging ic before there is 3v now 0V pin11 before 0v now 5v and VH28 before 30v now 2V

[siddiq]

Re: Hp dv6000 no power

What voltages do you have on PQ61? [VAD, PWRSRC].

[goodbrethen]

Re: Hp dv6000 no power

PIN 5,6,7,8-19v PIN4-2V PIN 123-0v

[goodbrethen]

Re: Hp dv6000 no power

actually i short the pin 1 and 8 the laptop is working but the battery is not charging, it means that i have a problem only in ac adaptor side.

[popeye]

Re: Hp dv6000 no power

are you using an original power supply as some laptops will not charge unless you have HP charger?

[goodbrethen]

Re: Hp dv6000 no power

yes, all the charger are original i used 18.5v and 19v charger, and im 100% sure that is not charger problem. my problem is the gate voltage at PQ61 is only 2v this one should be at 5v-12v

[opamp]

Re: Hp dv6000 no power

Check pc202 it should have 5 volts on the side of the gate and 19 volts on the side of the power source. Also check pq64 out of circuit and resistors 182 and 183.

[opamp]

Re: Hp dv6000 no power

Also check resistor 193. Max 8724 should have voltage like this:
pins
1=19v
2=5v
3=2.3v
4=4v
5=0
6=0
7=0
8=3.3v
9=0
10=3.3v
11=.3v
12=3.3v
13=0
14=0
15=5.3v
16=.13v
17=1.6v
18=.13v
19=.13v
20=0
21=0
22=5.3v
23=.13v
24=5.10v
25=.13v
26=19v
27=19v
28=0