Packard Bell NS11-HR-103 no power

[a6464]

Good day to everyone. I hope you guys can help me regarding this PBell laptop. This came one week ago, and it has no power and no blinking lights. I've tested the power adapter and it is perfectly working. I did disassembled it and saw no damage.

To fix the problem, I found a schematic diagram of its motherboard in this forum because I'm very lucky and found that laptop have the same motherboard than Acer Aspire 4750_4750G_Wistron_JE40-HR.

Here's the exact model of the laptop: Packard Bell Easynote NS11-HR-103 and also this is printed on the motherboard itself: JE40-HR-MB 10267-4.
I made some investigation but I Hope to hear from you guys.
Thanks very much in advance!

[a6464]

Re: Packard Bell NS11-HR-103 no power

I cheked The voltage of the charching chip PU4003:
1=0v
2=2,91v
3=2,53
4=0
5=0
6=0
7=0
8=0
9=2,8
10=2,8
11=2,8
12=0.0
13=2.42
14=0
15=1,14
16=1,14
17=1,14
18=1,14
19=0.0
20=0.0
21=4,15
22=15,4
23=1,08
24=1,08
25=4,18
26=4,18
27=16,13
28=16,13

and something very strange the cap C5905 have no resistance at all (over 200Mhom).

[cyberhack]

Re: Packard Bell NS11-HR-103 no power

Should the input be 19v?

[a6464]

Re: Packard Bell NS11-HR-103 no power

Yesterday when I made the measure it came 16,13, now it came 18,20V. I remeasured all the previous date on the chip.
1=0v
2=3,41v
3=2,99
4=0
5=0
6=0
7=0
8=0
9=3,10
10=3,10
11=3,26
12=0.0
13=2.72
14=0
15=0,46
16=0,46
17=0,46
18=0,46
19=0.0
20=0.0
21=4,75
22=17,14
23=2,34
24=2,34
25=4,68
26=4,70
27=18,20
28=18,20

Thanks for your reply.

[ktmmotocross]

Re: Packard Bell NS11-HR-103 no power

this vin is way low and 3.3v rail is too low too.

as first 5v and 3.3v must be located. dont bother the charging chip

[a6464]

Re: Packard Bell NS11-HR-103 no power

thanks ktmmotocross, you're right. I found the 5V/3D3V chip and I cheked all pin and their values.....

and i touched him to see...ouch!!! it was over heating to over 50°C.

to replace him the reference was RT8223MGQW with EQ=DH N1N on the chip.

is RT8223MGQW EQ=DC or EQ=EE is fine for replacement?

thanks for your reply

[Th3_uN1Qu3]

Re: Packard Bell NS11-HR-103 no power

I'd bet on a short downstream rather than the PWM IC itself in this case. Check the parts connected to the LDOs of the chip and then check 3.3v and 5v main. I smell a shorted mosfet or capacitor in there somewhere.

[a6464]

Re: Packard Bell NS11-HR-103 no power

I cheked the voltage of 5V/3D3V chip :
(with an inpud dc 16,8V)

1=0,85v
2=0v
3=1,57
4=1,57
5=0
6=0,94
7=0
8=2,68
9=3,67
10=0
11=0
12=0.0
13=2.58
14=2,80
15=0
16=15,7
17=4,13
18=2,5
19=0.1
20=4,15
21=4,15
22=8,05
23=0
24=4,18

LDOs of the chip

Can you explain where to check 3.3v and 5v main ?

I don't have capacitor but when i cheked the voltage difference around there for each capacitor, I found that only PC4125 have no voltage difference !!!

Is it the source of the failure? and if so witch capacity can I use to replace him?

[ktmmotocross]

Re: Packard Bell NS11-HR-103 no power

on the coils. check for short on 3.3v rail without power

[a6464]

Re: Packard Bell NS11-HR-103 no power

I checked all coils to detect shorts to ground but nothing came out. they have at least 25ohm to ground.

[whaldsz]

Re: Packard Bell NS11-HR-103 no power

pin 16 of PU4103 indicates a reading of 15.7v. But previously you mentioned it is 16.3v and 18.2v.

Could you check if the mosfets PU4002, PU4004 and PU4005 is ok? There is a failing component in your DCBATOUT rail.

Could you post the resistance readings of all coils?

[a6464]

Re: Packard Bell NS11-HR-103 no power

For me it was strange too to have different voltage of DCBATOUT, but when I checked the adaptor output it was the same voltage value. I cheked a different adaptor that i use on a different laptop that work perfectly, I saw that's was the same thing, and no problem.

I cheked
PU 4001 ( pin 4 5,55V others 16,96V )
PU 4002 ( pin 1-4 16,95V others 0,70V ),
PU 4004 ( pin 1-4 0,70V others 16,92V ),
PU 4005 ( pin 1-4 0V others 0,80V )

I cheked all coins and theirs resistance reading to ground. Thanks

[a6464]

Re: Packard Bell NS11-HR-103 no power

perhaps I found the guilty part. I think it's PTC4101 because when I apply the multimeter on him to mesure the resistance, the display goes to 6ohm but the other cap the display goes up high and continue to move...
and what do you think? am I right?

[dj_ricoh]

Re: Packard Bell NS11-HR-103 no power

you know you can lift it up and check without

[whaldsz]

Re: Packard Bell NS11-HR-103 no power

It's possible that PU4102 is broken. Test it.

[a6464]

Re: Packard Bell NS11-HR-103 no power

you know you can lift it up and check without

the cap looks fine finally! so it may be the 4102 who shut down!