• HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Danes je 4 Februar 2026, 00:43

HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

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#1 HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 8 December 2022, 10:20
Witam. Na stole HP 15-cx0073nw mb: DPK54 LA-F841P. Objaw usterki - zwarcie na zasilaniu. Zauważyłem nagrzewające się okolice PQB03. Próba zwarciowa za tym mosfetem na PRB03 przy 1,2V i 2A powoduje lekko nagrzewający się rdzeń UC1 :( - CPU na straty czy można jeszcze coś sprawdzić ?

Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a Google Adsense [BOT] • 8 December 2022, 10:20

#2 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 8 December 2022, 10:44
Hello!

Measure the resistances on all coils in reference to the resistor PRB03.

#3 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 8 December 2022, 10:53
Coil measurements, no RAM:

PL301 -28kohm
PL302 -55kohm
PLB02- 190kohm
PLM1-5kohm
PL10001-48ohm
PLW1-180ohm
PLV2-2,6ohm
PLV1-2,8ohm
PLV3-2,6ohm
PLH1-92ohm
PLA1-30ohm
PLZ4-1,6ohm
PLZ3-1,8ohm
PLZ2-1,7ohm
PLZ1-1,6ohm
PLG1-10,2ohm

#4 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 8 December 2022, 11:21
Are these measurements in reference to ground or the resistor PRB03?

#5 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 8 December 2022, 11:44
matic napisal/-a:Are these measurements in reference to ground or the resistor PRB03?


My mistake, i misunderstood. Below are the measurements for the resistor PRB03

PL301 -32kohm
PL302 -63kohm
PLB02- 190kohm
PLM1-500hm
PL10001-48ohm
PLW1-180ohm
PLV2-2,5ohm
PLV1-3,8ohm
PLV3-2,5ohm
PLH1-87ohm
PLA1-29ohm
PLZ4-0,03ohm
PLZ3-0,03ohm
PLZ2-0,04ohm
PLZ1-0,03ohm
PLG1-10,2ohm

#6 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 8 December 2022, 11:55
One of the DrMOS chips PUZ2, PUZ3, PUZ4 or PUZ5 is damaged almost for sure.

Remove the coils PLZ1, PLZ2, PLZ3, PLZ4 one by one from the board and check which one needs to be removed that the resistance to ground on the resistor PRB03 increases significantly.

#7 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 8 December 2022, 12:22
matic napisal/-a:One of the DrMOS chips PUZ2, PUZ3, PUZ4 or PUZ5 is damaged almost for sure.

Remove the coils PLZ1, PLZ2, PLZ3, PLZ4 one by one from the board and check which one needs to be removed that the resistance to ground on the resistor PRB03 increases significantly.


As the first to desolder PLZ4 .. the resistance to PR increased above 200 ohm on the other coils. To replace PUZ5?

#8 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 8 December 2022, 13:05
pawel1978 napisal/-a:As the first to desolder PLZ4 .. the resistance to PR increased above 200 ohm on the other coils.
Measure the resistance to ground on resistor PRB03 without the coil PLZ4. It should be in kΩ range (or greater).
pawel1978 napisal/-a:To replace PUZ5?
Yes, the DrMOS chip PUZ5 needs to be replaced.

Also check the transistors PQB01 and PQB03.

#9 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 8 December 2022, 13:17
matic napisal/-a:Measure the resistance to ground on resistor PRB03 without the coil PLZ4. It should be in kΩ range (or greater).


Resisatnce is 1,8kohm

matic napisal/-a:Also check the transistors PQB01 and PQB03.


PQB01 is also faulty (shorted)

#10 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 8 December 2022, 13:48
pawel1978 napisal/-a:
matic napisal/-a:Measure the resistance to ground on resistor PRB03 without the coil PLZ4. It should be in kΩ range (or greater).
Resisatnce is 1,8kohm
Remove the DrMOS PUZ5 and remeasure this resistance.

pawel1978 napisal/-a:
matic napisal/-a:Also check the transistors PQB01 and PQB03.
PQB01 is also faulty (shorted)
So it needs to be replaced as well.

#11 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 9 December 2022, 13:34
Both systems replaced. The laptop starts with a black screen. Caps-lock LED blinks 5 times slow and 3 times fast. Current consumption without batteries 1.2A.
After starting it appears on PLZ4 - 1.05V

#12 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 9 December 2022, 19:38
- Measure the voltages to ground on all coils when the machine is turned on.
- Measure the power consumption (in mA) of the board when the machine is turned on without RAM memory connected.

#13 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 12 December 2022, 10:34
matic napisal/-a:- Measure the voltages to ground on all coils when the machine is turned on.
- Measure the power consumption (in mA) of the board when the machine is turned on without RAM memory connected.


PL301 -3,3V
PL302 -5V
PLB02- 0,17V
PLM1-1,20V
PL1001-1,05V
PLW1-1,38V
PLV2-0,8V
PLV1-0,8V
PLV3-0,8V
PLH1-0,95V
PLA1-1,05V
PLZ4-1.07V
PLZ3-1.07V
PLZ2-1.07V
PLZ1-1.07C
PLG1-0V

Power consumption 1,28A with ram and the same without ram modules. (no battery conected)

#14 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 17 December 2022, 14:06
Please, specify the markings on chip PUG1 or post a clear picture with visible markings on it.

#15 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 19 December 2022, 09:21
matic napisal/-a:Please, specify the markings on chip PUG1 or post a clear picture with visible markings on it.


pug1 markings: 302045 GAD1927

#16 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 19 December 2022, 09:38
Measure the voltages to ground on pins 1, 2, 3, 5, 8, 29, 30, 31 of chip PUG1 when the machine is turned on.
Chip PUG1 pin count:
Slika

#17 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a pawel1978 • 19 December 2022, 09:58
matic napisal/-a:Measure the voltages to ground on pins 1, 2, 3, 5, 8, 29, 30, 31 of chip PUG1 when the machine is turned on.
Chip PUG1 pin count:
[ Obrazek ]


I take measurements without a heatsink .. unfortunately, the board without it turns itself off after a few seconds, although I don't feel that the cpu or graphics heat up much.

p.1 - 2V
p2. - 5V
p3 - 5V
p.8 - 19.5V
p29 -4.78V
p30-4.78V
p31-0.49V

#18 Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a matic • 31 December 2022, 17:07
The CPU is very likely damaged and needs to be replaced.

Re: HP 15-cx0073nw mb: DPK54 LA-F841P - zwarcie na zasilaniu, grzeje się CPU

Napisal/-a Google Adsense [BOT] • 31 December 2022, 17:07
 Ta tema je označena kot ARHIVSKA. Odgovorite samo, če vaše sporočilo vsebuje rešitev (Pravila in Pogoji, 12.1).
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