Forum rules: Click here to view the forum rules
- Topic title should contain: the device's manufacturer, full model and the brief description of problem.
- Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
- Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
- Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
- It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
- Requesting of the full schematics, BoardView files, BIOS files or any other kind of documentation is NOT ALLOWED in this subforum. If you need to ask for any of these, you should open a new topic in DOCUMENTATION/BIOS REQUEST subforum.
Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by Google Adsense [BOT] • 13 October 2025, 17:10
#3 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by kuras00 • 14 October 2025, 10:05
matic wrote:Hello!
Measure the voltages to ground on pins 1, 4, 5 of transistors PQ1002, PQ1003.
Teraz zauważyłem jeszcze, że nie uruchamia się na samym zasilaczu i nie ładuje baterii. Czy może to być spowodowane tym, że nie mogę podać 7,7A?
Zasilacz + bateria :
F4502 - 19,5V
PQ1002:
- N1 - 19,5V
N4 - 25,25V
N5 - 19,5V
- N1 - 19,5V
N4 - 25,25V
N5 - 19,5V
Sam zasilacz - to samo co wyżej
Sama bateria :
F4502 - 10,5V
PQ1002:
- N1 - 0V
N4 - 0V
N5 - 10,5V
- N1 - 0V
N4 - 0V
N5 - impuls 2V i spada
EDIT:
Z oryg. zasilaczem ładuje baterię i się uruchamia, po podładowaniu na baterii pomiary identyczne F4502 i N5 PQ1002 = napięciu baterii, N5 PQ1003 dostaje impuls i spada, N4 i N1 0V
#4 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by matic • 17 October 2025, 08:13
kuras00 wrote:Teraz zauważyłem jeszcze, że nie uruchamia się na samym zasilaczu i nie ładuje baterii. Czy może to być spowodowane tym, że nie mogę podać 7,7A?Did you use a properly prepared service DC cable with a resistor connected to the central pin?
kuras00 wrote:jednak napięcie wydaje mi się ciut małe bo tylko ~10,5V z obydwu stron F4502Was this measurement taken while the machine was running on the battery or the power supply?
#5 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by kuras00 • 17 October 2025, 09:43
matic wrote:Did you use a properly prepared service DC cable with a resistor connected to the central pin?
Bez spreparowanego kabla. Mam już dostarczony oryginalny zasilacz i laptop się uruchamia + jest ładowanie.
matic wrote:Was this measurement taken while the machine was running on the battery or the power supply?
Na baterii. Po naładowaniu na uruchomieniu z baterii jest 11,5V, z zasilacza 19,5V, zasilacz + bateria 19,5V - we wszystkich przypadkach brak podświetlenia (taśmę podstawiałem - bez zmian).
#12 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by matic • 17 October 2025, 13:06
kuras00 wrote:One of this two measurements is definitely wrong, otherwise the schematic I have is incompatible with your board.matic wrote:Measure the resistances to ground on both pins of resistor R7008 with the matrix connected to the board.N1 - 91,9Ω
N2 - 90,9Ω
kuras00 wrote:Idąc dalej R7013 N1 i N2 91,9ΩAnd also there can't be the same resistance on both pins of this resistor since the resistor value is 10Ω.
kuras00 wrote:Impossible since the value of resistor R7008 is 1kΩ and the resistance to ground on one side of this resistor is around 100Ω. Based on your measurements, I expect a maximum value of 1.1kΩ on this pin.matic wrote:Measure the resistance to ground on pin 4 of LVDS connector CN7000 with the matrix connected.70kΩ
kuras00 wrote:DAG3JBMB8D0Please, check the motherboard marking code you specified is correct.
Post a clear picture of your board. Also post a picture of R7008/R7013 area of the board.
#14 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by matic • 17 October 2025, 15:03
The schematic and BoardView seems to be compatible with your board.
You should taken the measurements on the wrong components/pins, otherwise there should be something wrong with your meter.
Check the continuity between pin 5 of LVDS connector and point "A".
If the continuity is fine, remeasure the resistances to ground on points "A", "B", "C" and pin 5 of LVDS connector.
You should taken the measurements on the wrong components/pins, otherwise there should be something wrong with your meter.
Check the continuity between pin 5 of LVDS connector and point "A".
If the continuity is fine, remeasure the resistances to ground on points "A", "B", "C" and pin 5 of LVDS connector.
#16 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by matic • 17 October 2025, 15:56
That's completely different measurements, and the resistances seems fine now.
- Measure the voltage to ground at point "C" while the machine is turned on with the matrix connected.
- Measure the voltage to ground at point "C" while the machine is turned on with the matrix connected.
matic wrote:[ Obrazek ]
#18 Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by matic • 17 October 2025, 20:19
Remove the resistor R7013 from the board and remeasure the voltage to ground at point "C" while the machine is turned on.
If the voltage is still below 1V, turn off the machine, disconnect the power supply and wait abut two minutes. Then set your multimeter to the diode test mode and measure the voltage drop to ground at point "C" with the positive (red) probe connected to ground.
If the voltage is still below 1V, turn off the machine, disconnect the power supply and wait abut two minutes. Then set your multimeter to the diode test mode and measure the voltage drop to ground at point "C" with the positive (red) probe connected to ground.
Re: HP Pavillon Gaming 16-a0034nw (DAG3JBMB8D0) - brak podświetlenia matrycy
by Google Adsense [BOT] • 18 October 2025, 09:57
Who is online
Users browsing this forum: No registered users and 4 guests
_______________________________All rights reserved. Unauthorised copying of this website's content or any of its part is strictly forbidden.
Any trademarks, brand names, products or services published on this website belong to their legal owners, are copyrighted and used for information purposes only.