HP ProBook 4510s power problem

[rtstorm]

Re: HP ProBook 4510s power problem

i have an hp probook 4510s and its power jack blue light blinking continuously.and does not power on plz any one help me

Please start new thread

[rtstorm]

Re: HP ProBook 4510s power problem

hello, this notebook return to me. Now it will start but shout down randomly. Usualy after few minutes (5-10)

I check temp and it is ok. The laptop is being used with no battery.

I try another adapter and the same.

[passete]

Re: HP ProBook 4510s power problem

I have this same laptop to repair !
i have 19V on some points, but didn't find any 5 or 3.3V.
No power on bios, so i still flashed but no change
OP says that he solved the problem by swapping R29, i have spend some time searching for this R29, but i can't find it.
Can any of you point me where to look for this R29 ?

Thanks guys

[meritosari]

Re: HP ProBook 4510s power problem

Look attachment at post #12, img623-copy.jpg. You could see it.

[passete]

Re: HP ProBook 4510s power problem

Look attachment at post #12, img623-copy.jpg. You could see it.

Look attachment at post #12, img623-copy.jpg. You could see it.

Thanks Buddy,
Now I understand why I was having big time finding the components of this thread !
My Mobo is similar, but not exactly the same !


Here the reference :


Do you know which component should I test ?
Thanks

[meritosari]

Re: HP ProBook 4510s power problem

look to post#22, download it the attachment. your working 100% same with schematic and broadview.
so if you want to test component, compare it both the schematic invicta and zenith. i think how does those working exactly same. R29 on invicta, R2033 on zenith.

[passete]

Re: HP ProBook 4510s power problem

look to post#22, download it the attachment. your working 100% same with schematic and broadview.
so if you want to test component, compare it both the schematic invicta and zenith. i think how does those working exactly same. R29 on invicta, R2033 on zenith.

R2033 is OK, but i don't have any tension on U1, U4 and many others on the same location !
Do you have any other tips or components to check, please ?

Thanks

[meritosari]

Re: HP ProBook 4510s power problem

+VBATR got voltage 19v?
voltages on U10 all pin?

[saularciga]

Re: HP ProBook 4510s power problem

Hello , only change U1004 and.... ready . This I.C , es very common damage.

[meritosari]

Re: HP ProBook 4510s power problem

Hello , only change U1004 and.... ready . This I.C , es very common damage.

nice advice..
on invicta U1004, so that's mean on zenith was U8, right?

[passete]

Re: HP ProBook 4510s power problem

+VBATR got voltage 19v?
voltages on U10 all pin?

I don't find this U10 !
What is +VBATR ? i've mesured all pins on the battery connector i have :
0 Volts on all pins.
Mesured all legs on Bios = 0 Volts
On U8 i have 19V on all pins except 1 that i have 0V.
Hope that you understand.
Thanks

[meritosari]

Re: HP ProBook 4510s power problem

- please look at page 4 on schematic +vbatr come out after generated from power source which was OK. whether from adapter or battery (+12v-19v)

- U10 TPS51125 PWM for 5v and 3.3v (page 7)

- from your statement above its seem U8 was broken, every pin has 19v except 1 0v (i guess was ground). should try to follow advice from saularciga to change the LM393, don't forget check resistor around it. (voltage divider:R1241,R1239)

- check resistance every mosfet (page 5 and 6) S to D, D to S and respect to ground

[passete]

Re: HP ProBook 4510s power problem

- please look at page 4 on schematic +vbatr come out after generated from power source which was OK. whether from adapter or battery (+12v-19v)

- U10 TPS51125 PWM for 5v and 3.3v (page 7)

- from your statement above its seem U8 was broken, every pin has 19v except 1 0v (i guess was ground). should try to follow advice from saularciga to change the LM393, don't forget check resistor around it. (voltage divider:R1241,R1239)

- check resistance every mosfet (page 5 and 6) S to D, D to S and respect to ground

Well, I must be blind or we are talking about different mobos !
I can't find, U10, LM393, R1241 or R1239 Lol !
Anyway, I'm posting 2 photos from the hole mobo, maybe you can point where are those ?
Thanks a lot

[passete]

Re: HP ProBook 4510s power problem

EDIT: i finally found the U10, it's a multi leg chip, but i read 0V on all pins, still not find the rest !

[meritosari]

Re: HP ProBook 4510s power problem

EDIT: i finally found the U10, it's a multi leg chip, but i read 0V on all pins, still not find the rest !

please use the boardview (6050A2252601) as i mention in post#46. locate at post#22. open it with place5-f2b.

http://laptopserviz.bg/enview/bvsoft/
http://laptopserviz.bg/media/wysiwyg/place5-F2B.rar