HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

[classicandy]

Hi everyone....

please i need help; I have an HP Elitebook Folio 1040 g3 which was damaged by water.... I've replaced the 5VPCU regulator IC [Power IC] which shorted out due to the water damage.

Now, it turns on, blinks the capslock/numlock light 5 times then restarts and repeats the blink process again and does that continuously.

According to HP site, the 5 blinks is a System Board Failure.

Who has any idea on how it can be fixed should PLEASE help out... No component on the board has labels, so it is hard to trace using Schematics

[MOD EDIT] Link to schematic - https://www.badcaps.net/forum/troubl...-y0f-schematic

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

What are the missing voltage on the coils ? Is your +3/5/1.8VPCU are fine? Follow the page 67 power block & update what are the missing voltage

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

What are the missing voltage on the coils ? Is your +3/5/1.8VPCU are fine? Follow the page 67 power block & update what are the missing voltage

Okay, thanks for the prompt reply, +3/5/1.8VPCU are okay...

only 2 coils have missing voltages

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Okay, thanks for the prompt reply, +3/5/1.8VPCU are okay...

only 2 coils have missing voltages

what is the PL number PL40 29

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

what is the PL number PL40 29

It is not labelled on the board. Lemme try to trace it using the schematics

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

what is the PL number PL40 29

Coils PL36 and PL38 have NO volts (0v).

Which makes +VCC_GT absent

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Coils PL36 and PL38 have NO volts (0v).

Which makes +VCC_GT absent

check the Resistence to GND on PL38/36 , remove PL12 & power the MB to see if it's power up , check PQ16/17 check PU16/17 for any short & voltage of all pins PU16/17 ?

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

check the Resistence to GND on PL38/36 , remove PL12 & power the MB to see if it's power up , check PQ16/17 check PU16/17 for any short & voltage of all pins PU16/17 ?

Resistance to ground on PL36/38 = 4.6 ohms

Without PL12, the problem is still the same, 5 blinks .....

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

check the Resistence to GND on PL38/36 , remove PL12 & power the MB to see if it's power up , check PQ16/17 check PU16/17 for any short & voltage of all pins PU16/17 ?

No shorts found so far.......

PQ16/17 ....... okay

PU16
Pin 1 = 10.70 [Vin]
Pin 2 = 0v [GND]
Pin 3 = 1.3v [suspicious]
Pin 4 = 0v [NC]
Pin 5 = 5.12v
Pin 6 = 5.12v
Pin 7 = 5.12v
Pin 8 = 8.53v
Pin 9 = 3.53v
Pin 10 = 0v
Pin 11 = 2.43v
Pin 12 = 4.5v

PU24
Pin 13 = 0v [1V8A_PG]........

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

No shorts found so far.......

PQ16/17 ....... okay

PU16
Pin 1 = 10.70 [Vin]
Pin 2 = 0v [GND]
Pin 3 = 1.3v [suspicious]
Pin 4 = 0v [NC]
Pin 5 = 5.12v
Pin 6 = 5.12v
Pin 7 = 5.12v
Pin 8 = 8.53v
Pin 9 = 3.53v
Pin 10 = 0v
Pin 11 = 2.43v
Pin 12 = 4.5v

PU24
Pin 13 = 0v [1V8A_PG]........

check DRVON on EN on PU22 than live is ok for me ! pin 2 is not GND PWM1_2ph so test again Ohms , PIN 6 is GND so check again

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Resistance to ground on PL36/38 = 4.6 ohms

Without PL12, the problem is still the same, 5 blinks .....

4.6ohms quite ok since it's CPU SOC , what is the voltage on PU21 pin 13 8 ? PU5 pin 8 ?

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

check DRVON on EN on PU22 than live is ok for me ! pin 2 is not GND PWM1_2ph so test again Ohms , PIN 6 is GND so check again

Those readings are for PU16. Pin 2 of PU16 is PGND while Pin 2 of PU17 is PWM1_2ph

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PU17/18 Readings:

Pin 1 = 5.0v
Pin 2 = 2.0v
Pin 3 = 4.9v
Pin 4 = 5.12v
Pin 5 = 0v
Pin 6 = 0v
Pin 7 = 0v
Pin 8 = 0v

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

check DRVON on EN on PU22 than live is ok for me ! pin 2 is not GND PWM1_2ph so test again Ohms , PIN 6 is GND so check again

PU22 Readings:
Pin 1 = 5.89v
Pin 2 = 0.53v
Pin 3 = 4.9v [DRVON_EN]
Pin 4 = 5.12v
Pin 5 = 4.47v
Pin 6 = 0v
Pin 7 = 1.05v
Pin 8 = 1.50v

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

No shorts found so far.......

PQ16/17 ....... okay

PU16
Pin 1 = 10.70 [Vin]
Pin 2 = 0v [GND]
Pin 3 = 1.3v [suspicious]
Pin 4 = 0v [NC]
Pin 5 = 5.12v
Pin 6 = 5.12v
Pin 7 = 5.12v
Pin 8 = 8.53v
Pin 9 = 3.53v
Pin 10 = 0v
Pin 11 = 2.43v
Pin 12 = 4.5v

PU24
Pin 13 = 0v [1V8A_PG]........

Yep PG is your problem how did miss it find out PR302 PR297 PR67 PR180 for any short or leak if ok remove PR302 & see if PG is coming back

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Yep PG is your problem how did miss it find out PR302 PR297 PR67 PR180 for any short or leak if ok remove PR302 & see if PG is coming back

PR302 & PR297 are short pads

PR67 = 2.58k ohms (3.3k ohms stated in schematics)

After removing PR302, PG is still 1.3v. But after comparing it with another working board (1040 g1), the 1.3v seems to be okay......

[Techtiger]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

PR302 & PR297 are short pads

PR67 = 2.58k ohms (3.3k ohms stated in schematics)

After removing PR302, PG is still 1.3v. But after comparing it with another working board (1040 g1), the 1.3v seems to be okay......

what is the voltage on PG PU14 pin3 ? on your mob & 1040 G1 ? check what are rest PG missing

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

what is the voltage on PG PU14 pin3 ? on your mob & 1040 G1 ? check what are rest PG missing

PU14 Pin 3 [PG] = 3.06v [1040 g3]

I haven't seen a schematic for 1040 g1. I want to try and search for a schematic of another motherboard using same power IC (3v_5v Regulator) as 1040 g1

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

Thanks for your assistance so far

[classicandy]

Re: HP Elitebook Folio 1040 g3 Capslock/Numlock 5 blinks

what is the voltage on PG PU14 pin3 ? on your mob & 1040 G1 ? check what are rest PG missing

For 1040 g1, Power IC is TPS51285A. PG [Pin 7] = 3.36v