Dell Inspiron 17R 5737 VBW11 LA-9984P REV 1.0 - Problem z RAM - 4 sygnały

Dzień Dobry

Na blacie płyta o DELL'a.
Nie wykrywa RAM. Uruchamia się.
Jak wyciągnę kości to są 2 piknięcia, czyli brak RAM.
Jak włożę kość to są 4 piknięcia, problem z RAM.

RAM jest na pewno sprawny, zresztą testowałem na kilku.
Wsadzałem do innego slotu, bez zmian. Czyściłem sloty, oglądałem nic tam niepokojącego nie ma.
1.35V obecne.

Od czego powinienem zacząć dalsze poszukiwania?
Z góry dzięki za wsparcie.

Hello!

Use a DDR3 RAM slot LED tester and test both RAM slots.

Hello

I have this tester. Actually, I couldn't put it into the slot at first, but I managed to do it.
The question is whether this is how it should work. ODT0 and ODT1 shine the most.

Do all the LEDs shine, including the marked ones?

All LEDs shine.

edit.

I will also add that... The laptop beeps after starting. As if some coil was squeaking.
I tried to upload the BIOS, no changes, the laptop still signals 4 signals, there is a problem with RAM.

Dzień Dobry

Czu uda się coś podziałać więcej w temacie tego sprzętu?
Trochę mi go szkoda bo tam i7 jest na pokładzie.

Have you tested the board with a low voltage DDR3L RAM memory?
If so, insert one RAM stick into the slot JDIMM1 and perform the following measurements:
- Measure the voltages to ground on pins 1, 73, 113, 121, 197, 199, 201, 203 of JDIMM1.
- Measure the voltages to ground on jumpers RX6, RX31.
- Measure the voltage directly on capacitors CD3, CD21 (CD3 is probably not present, but measure on its pads anyway).

Hello

matic написав:Have you tested the board with a low voltage DDR3L RAM memory?

YES

matic написав:If so, insert one RAM stick into the slot JDIMM1 and perform the following measurements:
- Measure the voltages to ground on pins 1, 73, 113, 121, 197, 199, 201, 203 of JDIMM1.
- Measure the voltages to ground on jumpers RX6, RX31.
- Measure the voltage directly on capacitors CD3, CD21 (CD3 is probably not present, but measure on its pads anyway).

1 pin - 0,67V
73 pin - 1,067V
113 pin - 0,29V
121 pin - 0,865V
197 pin - 0V
199 pin - 3,3V
201 pin - 0V
203 pin - 0,67V

rx6 - 2,6V
rx31 - 2,5V

cd21 - I cant find
cd23 - 4,9V

I have a question about RX6 RX31 and CD23, did I use good points?

Any updates?

UP

Golima написав:cd21 - I cant find

Golima написав:cd23 - 4,9V

I asked about CD3, not 23.

Golima написав:I have a question about RX6 RX31 and CD23, did I use good points?

Yes, you did.

Also measure the voltages to ground on jumpers RX6, RX31 with an oscilloscope, if you have it.

matic написав:

Golima написав:cd21 - I cant find

[ Obrazek ]

CD3 - 1,4V
CD21 - 0,6V

matic написав:[quote="Golima"Also measure the voltages to ground on jumpers RX6, RX31 with an oscilloscope, if you have it.

I don't have oscilloscope.

The RAM controller inside the APU is very likely damaged.
You can try to reflow the APU hybrid, but it needs to be replaced for a permanent repair.

Tak myślałem. Niestety w BGA jeszcze się nie bawię. Przede wszystkim nie mam sprzętu do tego.
OK, myślę że wątek wyczerpany. Kolejne przygody przede mną. Dzięki!