HP G4 DA0R24MB6G0 totally dead, no leds

[ruletero]

Hi all

I have this HP G4 with DA0R24MB6G0 totally dead, no ac led on, none led on.

I have:

+VIN 19v
ACIN = 3.3v
+3VPCU = 3.3v

Then charger system look good, but I don't have S5_ON, then, don't have +3VS5, +5VS5, etcetera.

KBC (KB3930QF) has 3.3v (+3VPCU) pin 9 (VCC), the question is what other signal does KBC need to generate S5_ON?

Bios has 3.3v in pin 8, I programmed Bios without sucess, same behaviour.

Does kbc is dead?? or it need to be programmed?

Please help me :/, thank you for your responses.

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Check RSMRST# DNBSWON# AD_TYPE

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Hi Techtiger

Sorry for my late response

RSMRST# = 0
DNBSWON = 0.9v (pin 90 KBC)
AD_TYPE = 0.59 v

I know RSMRST# must to be released when AC charger is detected, in this case nothing happen

Thank you

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Someone could help me?

I see AD_TYPE fine, I think DNBSWON should be high (3.3v) and RSMRST# high too, what other thing I should to check?

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Hi Techtiger

Sorry for my late response

RSMRST# = 0
DNBSWON = 0.9v (pin 90 KBC)
AD_TYPE = 0.59 v

I know RSMRST# must to be released when AC charger is detected, in this case nothing happen

Thank you

are you using a original adapter as you know for HP to AC_LED_ON# need a Original one , find AD_ID what is the voltage R110 D20 R112 both side

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Someone could help me?

I see AD_TYPE fine, I think DNBSWON should be high (3.3v) and RSMRST# high too, what other thing I should to check?

for the moment leave DNBSWON & RSMRST you need ALWS before +3VS5, +5VS5 voltage of all pins PU2 ?

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Yes, I have two original chargers, here the values:

AD_ID in center pin of charger disconnected = 14v
AD_ID in DC JACK ( connected) 5v ??

AD_ID in:

R110 0.6v both sides
R112 0.6v both sides
D20 3.3v side 1, 0.6v side 2

I guess there is something bad in that circuit, but I don't know what...

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

PU2:

Pin Value
13 EN 2.52v
23 PGOOD 0V
16 VIN 19V
8 +3PVCU 3.3V
17 +5VPCU 5V
3 VREG 2.0V
18 ENC 0V

The only signal that IC need to generate 3valw / 5valw is not present, S5_ON

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Yes, I have two original chargers, here the values:

AD_ID in center pin of charger disconnected = 14v
AD_ID in DC JACK ( connected) 5v ??

AD_ID in:

R110 0.6v both sides
R112 0.6v both sides
D20 3.3v side 1, 0.6v side 2

I guess there is something bad in that circuit, but I don't know what...

the AD_ID pin (center pin) will be between 0 and 3V is it 0.60V if so with a 65W adapter i think its fine!

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

PU2:

Pin Value
13 EN 2.52v
23 PGOOD 0V
16 VIN 19V
8 +3PVCU 3.3V
17 +5VPCU 5V
3 VREG 2.0V
18 ENC 0V

The only signal that IC need to generate 3valw / 5valw is not present, S5_ON

Voltage on pin 1 6 ?

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

Voltage on pin 1 6 ?

They are connected to ground according to schematic :/

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

What other thing can I check?

I guess i'm in mistake, may be S5_ON appear only next to press the power button. In that case, I don't know why AC_LED_ON# doesn't appear.

What are the requirements to KBC realease AC_LED_ON#? That is the reason because I suspect fail in KBC.

Please help

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

you need +12VALW +5VPCU for AC_LED_ON# back trace it , & for the PU2 pin 1 & 6 (ENTRIP1/2 Channel 1 enable and Current Limit setting Input. Connecta resistor to GND to set the threshold for channel 1synchronous RDS(ON) sense. The GND − PHASE1 current-limit threshold is 1/10th the voltage seen at ENTRIP1 overa 0.5V to 2V range. There is an internal 10μA currentsource from VREG5 to ENTRIP1.)

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

What other thing can I check?

I guess i'm in mistake, may be S5_ON appear only next to press the power button. In that case, I don't know why AC_LED_ON# doesn't appear.

What are the requirements to KBC realease AC_LED_ON#? That is the reason because I suspect fail in KBC.

Please help

if S5_ON appear check the out put coils 3/5 ? when press PWRBTW

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

if S5_ON appear check the out put coils 3/5 ? when press PWRBTW

Sorry, I didn't explain fine. S5_ON never appear, on any case.

I only explained that now I think S5_ON appear after press power button.

My first idea was S5_ON should appear as soon I connect the charger, in this moment I'm not sure which is the correct.

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

If you have a DC lab apply 3V pin 18 and see if 3/5 VS5 on the coil Pl19/20

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

I inyected 3v to pin 18 of pu2 and I get 3alw and 5v alw, then, the IC and circuit are working.

What other thing should I to check?

Thank you again

[fauzanmint]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

have you reprogram bios? and chek acok

[ruletero]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

have you reprogram bios? and chek acok

Yes, I did it and ACOK is fine.

[Techtiger]

Re: HP G4 DA0R24MB6G0 totally dead, no leds

I inyected 3v to pin 18 of pu2 and I get 3alw and 5v alw, then, the IC and circuit are working.

What other thing should I to check?

Thank you again

check PU8 pin 13 14 20 17 for voltage