elitebook 820 G3

[nassih]

hello
i have an hp 820 G3 motherboard 6050a2725001-mb-a01 turn on with no display num lock is blinking 5 time and,i have flashing bios,change the RAM,all voltage is pesent.idont now if bios or other part in motherboard
pleas help

[mon2]

Re: elitebook 820 G3

5 blinks = system board error.

https://www.badcaps.net/forum/showthread.php?t=95754

see the posted post codes chart.

What is the history of this logic board? Any liquid spills ?

Just decided one day to start with this 5 blinks code ?

[nassih]

Re: elitebook 820 G3

5 blinks = system board error.

https://www.badcaps.net/forum/showthread.php?t=95754

see the posted post codes chart.

What is the history of this logic board? Any liquid spills ?

Just decided one day to start with this 5 blinks code ?

no liquid damage,no short,the customer informed me that the laptop is often in extended sleep mode

[mon2]

Re: elitebook 820 G3

https://www.bestsoltips.com/solved-h...-continuously/

Be sure that this is not a thermal issue. Clean vents, check and replace with good heatsink paste.


https://www.reddit.com/r/elitebook/c...tent=post_body

https://www.badcaps.net/forum/showthread.php?t=88845

[nassih]

Re: elitebook 820 G3

i have 2 coil without voltage in

[mon2]

Re: elitebook 820 G3

1) Power down. Remove the adapter and battery.

2) Meter in resistance mode (200 ohms scale).

Check the resistance to ground for each of these 2 coils that are missing the voltages.

What is the resistance for each coil ?

3) Post clear pictures of each coil and local mosfets and switching power supply IC. Post the markings on each mosfet and IC that is linked to each coil.

[nassih]

Re: elitebook 820 G3

resistance o 2 coil =6.7ohm

[nassih]

Re: elitebook 820 G3

this datasheet of the ic u66310 driving the 2 mosfet then sw1,sw2 goes to coil

[nassih]

Re: elitebook 820 G3

voltage on NCP81152:
BST1:5v
PWM1:2.0v
EN1:4.9v
VCC1:5.1v
BST2:5v
PWM2:2.0v
EN2:4.9v
VCC2:5.1v
DRVL2:0v
GND2:0v
SW2:0v
DRVH2:0v
DRVL1:0v
GND1:0
SW1:0v

[mon2]

Re: elitebook 820 G3

Is the mosfet driver linked to Q66310 & Q66320 in the shared photo?

Are the measured voltages with a connected battery?

If not, measure again with the battery to see if the following lines change their values (with battery):

DRVL2:0v
SW2:0v
DRVH2:0v
DRVL1:0v
SW1:0v

[nassih]

Re: elitebook 820 G3

yes sir
same voltage battery in

[mon2]

Re: elitebook 820 G3

Check to see if the mosfets are shorted.

Remove all power and battery.

Check the resistance between source and drain for each of the above mosfets.

Repeat measurements for source & gate; then drain and gate for each.

[smali]

Re: elitebook 820 G3

same issue with my 820 g3 laptop... i tried to reflach the bios shared in this form.. both the above mentioned both coils have no voltage..

[m2farid]

Re: elitebook 820 G3

Hi I have 3 laptops and all 3 got mad the fan is spining and the pcs get warm. i suspect a virus on my bios as I replace hard drives and fresh install of windows 10 and got same problem. Could you please look at this bios and clean it if necessary. I need a good clean bios file
Many thanks for all.

PS: I don't need password remove as there is no password

[mcplslg123]

Re: elitebook 820 G3

There is dedicated subforum for bios requests.