HP 450 G0 Charging port blinking

[DeniS182]

Hi all,
I have problem with this laptop. Only LED on charging port blinking. There is no 3.3V voltage on bios chip. Please help me identify chip from the picture and upload schematic if someone have. Thanks.

MB:
Fi Ji MB
12238-1
48 .4yz31.011

CHIP: E0 FC

edit: It is EQ FC - RT8223M

1. 0V
2. 0V
3. 2V
4. 2V
5. 0V
6. 0V
7. 0V
8. 3.3V
9. 4.5V
10.0V
11. 0V
12. 0V
13. 5.2V
14. 3.3V
15. 0V
16. 18.5V
17. 5V
18.0.4V
19. 0V
20. 0V
21. 0V
22. 4.5V
23. 0V
24. 0V

[DeniS182]

Re: HP 450 G0 Charging port blinking

I have 3.3V always power here, on power button also. I don't have voltage on the bios chip, I don't know why. Have someone schematic please? I found only similliar schematic, I attached it.

When I inject 3.3V to bios chip, LED on charging port blink and stay off, but after press power button nothing happen.

[Techtiger]

Re: HP 450 G0 Charging port blinking

R2509 Out side you should get 3D3V_AUX_S5 from Pin 8 RT8223MZQW 5/3 Volt regulater LDO3 inside of R2509 connected to Bios chip 1 pin 8/3 Bios2 pin8/3 3.3v

[DeniS182]

Re: HP 450 G0 Charging port blinking

I know but schematic is different, I have only one bios here and I can't find this resistor.

I found two resistors connected to 8pin of bios chip,near them, but there is no voltage on both sides of these resistors.
One of them is connected from SPI_CS pin to SPI_PWR - in schematic R2517 4k7 but my resistor is bad. I replaced it and connect bios 8pin with wire straight to VREG3, but there is big current consumption because voltage drops to 1V...

[Conste]

Re: HP 450 G0 Charging port blinking

Had the same Problem with an HP ProBook 6570b, when I used the original HP charger, the Problem disappeared

[DeniS182]

Re: HP 450 G0 Charging port blinking

I have new original HP 4.7A charger. And Id PIn on charging port is ok.
When I inject 3.3v to bios chip current consumptiion is 130mA and when I also connect charger 370mA.

[ktmmotocross]

Re: HP 450 G0 Charging port blinking

https://cdn.badcaps-static.com/pdfs/...b196680b71.pdf

no pgood signal

[DeniS182]

Re: HP 450 G0 Charging port blinking

Where can be the problem if this power good signal is missing? Thanks.

[Techtiger]

Re: HP 450 G0 Charging port blinking

https://cdn.badcaps-static.com/pdfs/...b196680b71.pdf

no pgood signal

PGOOD is an open-drain type output . PGOOD is actively held low in soft-start,standby, and shutdown. It is released when both output
voltages relese 3AlWS 5ALWS

correct me if i wrong ktmmotocross if he is not getting 3V/5V ALWS it will not generate?

[on/off]

Re: HP 450 G0 Charging port blinking

I have new original HP 4.7A charger. And Id PIn on charging port is ok.
When I inject 3.3v to bios chip current consumptiion is 130mA and when I also connect charger 370mA.

I would prefer check continuity between pin 8 bios chips to know where is source of power, where that pin is connect?
According schematic S-Series Intel Shark Bay as reference, the source connect via resistor R2508/switching or R2509/LDO (both value are 0 ohm or just jumper pad/shorted)
DY/light green= not installed.
3D3V_S5 =output RT8223M switching
3D3V_AUX_S5= LDO of RT8223M.
-ADP_DET shoud be high
-LID_SW# should be high.
Also pin 18 for Enable switching didn't go high. That's why there aren't outputs of IC RT8223 on grey coils.
The amperage have approx 130-370mA mean have resistance 9-24ohm, seem to low. Correct me if I wrong to calculate it. Look like this rail have little shorted.

[ktmmotocross]

Re: HP 450 G0 Charging port blinking

if u dont have 3.3 on bios and without bios it have it, than u must have bad bios or some component on that line

[DeniS182]

Re: HP 450 G0 Charging port blinking

LID_SW# - 3.3V
ADP_DET - 3.3V

bios chip is good and there is no voltage if is bios soldered or not. And from bios 8 pin it comes inside the motherboard.

[DeniS182]

Re: HP 450 G0 Charging port blinking

I can't find where is the problem. Have someone right schematic please? thanks.

[DeniS182]

Re: HP 450 G0 Charging port blinking

Problem was in missing ENC signal on RT8223M after inject 3.3V here notebook works normally.

[Techtiger]

Re: HP 450 G0 Charging port blinking

So ENC enable 2 SMPS plus connected internally to VREG3 , then your RT8223M is faulty in that stage is your 3/5V ALWS output after pressing Power Button? or after inject 3.3v to ENC ? And for the PGOOD signel comes after pressing power button or after 3/5V ALWS ?
Thanks

[DeniS182]

Re: HP 450 G0 Charging port blinking

I tried replace IC first, but nothing changed. Then I inject vreg3 to ENC pin and notebook works normally. After power button is pressed notebook start and works fine. I put all back together.

Thanks for answers.

[ktmmotocross]

Re: HP 450 G0 Charging port blinking

did u check pc4517 out of board?