HP Pavilion DV9500 - no display

witam próby naprawy dv9500 on czarny ekran przy starcie. I otrzymuje G86 770, ale nadal problem. Procesor pozostaje chłodna. Odtwarzacz DVD nie działa. I mierzona pod procesor (patrz zdjęcie) I 0V.
Mam do kontroli co?
dziękuję za pomoc

hello I try to repair a DV9500 he black screen at startup. I replaced G86 770 but still the problem. The processor stays cool. The DVD player does not work. I measured below the processor (see photo) I have 0v.
what do I have to control ?
thank you for your help

Greetings

Leave more informations about of board type ( like AT2 ; AT8 etc ). Then we will be able to give you more tips how to locate your issue on board. First of all you should check current on coils ( this two near CPU Socket ). As far I remember they suppose to be located at the right of CPU, check the voltage after when you press power button. The voltage has to jump from 0 V to 0.8 / 1.2 V. Also don't forget to connect external power supply ( with amp meter ) and leave for us your readings.

hello the motherboard is an AT8.
I measured PL9 and PL10 (red arrows on the photo) there is 0v.
I have no ammeter
thank you for your help

witam płyta AT8.
I mierzone i PL10 PL9 (czerwone strzałki na zdjęciu) jest 0V.
Nie mam amperomierz
dziękuję za pomoc

Replace max 8770
Wymień max 8770

witam, nie mogę zrobić test przed?

hello, I can not make test before?

Max8770 replace, not easy to check. You have a multimeter?


It's easier to replace than to check whether it is ok

Kazałem max8770 nie zostały jeszcze dostarczone.
tak mam miernik, mogę dokonać pomiarów until

I ordered the max8770 I have not yet been delivered.
yes I have a multimeter, I can make measurements until

On your photo - Quanta AT5

Rzeczywiście byłem w błędzie jest to AT5

Indeed I was mistaken it is a AT5

Please check the few voltages listed below (on the PU3 controller):

1. pin 38 (or PR125)
2. pin 19 (or PR123)
3. pin 30 (or PR25)
4. pin 20 (or PR28)
5. pin 8 (or PR133)
6. pin 6 (or PR140)

All the voltages must be measured reference to ground and the MB must be switched on (Power On state).

Hello here are the results of tests

Witam tu są wyniki badań

b38 --> 3.35v
b19 --> 0.94v
b30 --> 5.04v
b20 --> 5.04v
b8 --> 18.44v
b6 --> 0.94v

witam napięcia są prawidłowe?

hello voltages are correct?

sebuncle napisał(a):voltages are correct?

One of them isn't correct - voltage on pin 19 is too low (must be about +5V).
Check the PR123 resistor (10Ω) - i think it may be damaged.
But first You have to measure the resistance on pin 19 (reference to ground) - if the resistance seems to be very low (about few Ohms), the PU3 MAX8770 is definitely damaged too.

witam dziękuję za szybką odpowiedź! PR123, ponieważ brak! i PC158 (jaką wartość?). AT8 mam karty i może go otrzymać? Czy te same składniki, czy powyżej?
Jesteś silny! dziękuję

hello thank you for your quick response! PR123 because you lack! and PC158 (what value?). AT8 I have a card i can get it? Is there the same components whether or above?
You are strong! thank you

Pr 123 - 10Ω ( my mistake, sorry)
PC 158 - 220nF/10V

grisza69 napisał(a):Pr 123 - 10K
PC 158 - 22μ/10V

PR123 - 10Ω, not 10kΩ.
PC158 - 220nF/10V, not 22µF/10V.

sebuncle - please write in english only, don't translate into polish.
In AT8 You can find the parts You need.
PR132 or PR205 interchangeable with PR123, optional for PC158 You can use a 100-330nF capacitor.

I have found PR205 it is written 100 it's correct ? .
To replace PC158 I don't know the color codes and I have no AT8 scheme , can you help me to find 220nF/10V in AT8.
thank you very much.

sebuncle napisał(a):I have found PR205 it is written 100 it's correct ?

Yes, it's correct value.
Instead of 220nF You can place a 100nF capacitor - on AT8 there are (for example) PC165 or PC166, as PR205 located near PU10.

Hello I set up PR123 and PC158. The PC starts, the dvd is now supplied, but still black screen. I put the post card i get code 38 with 2 memory ,and with one memory i have with F1, it means these codes?
thank you for your valuable assistance.

Hello I have replaced and programmed the bios chip (25x80), I always error 38 on the debug card. What should I monitor?
thank you