Hp probook 6570b only external display

[usyusy]

I have hp probook 6570b that has only external display but nothing on the laptop screen.
Any guidance please.

(P/N: 010172N00-575-G
CASPER-UMA_CR_HPB
MV_MB_V1)

[usyusy]

Re: Hp probook 6570b only external display

Any tip from axperts plz

[mon2]

Re: Hp probook 6570b only external display

Check if the LCD display is working by applying a flashlight around the front side of the display. Can you see any graphics on the LCD display? If yes, then the backlight is an issue.

[usyusy]

Re: Hp probook 6570b only external display

Check if the LCD display is working by applying a flashlight around the front side of the display. Can you see any graphics on the LCD display? If yes, then the backlight is an issue.

no sir, same situation

[mon2]

Re: Hp probook 6570b only external display

Can you link any schematics for this logic board?

Perhaps the lcd display is damaged? What is the history of the laptop?

Any liquid damage? Check the lvds cable, connector, be sure the contacts are clean on the display cable.

Is the backlight working?

Suspecting there is a mux that routes the display traffic to either the external hdmi port or to the local display. Schematics will be helpful.

[Conste]

Re: Hp probook 6570b only external display

Integrated HD4000 or AMD graphics?

If AMD graphics probably there is the problem

[usyusy]

Re: Hp probook 6570b only external display

Can you link any schematics for this logic board?

Perhaps the lcd display is damaged? What is the history of the laptop?

Any liquid damage? Check the lvds cable, connector, be sure the contacts are clean on the display cable.

Is the backlight working?

Suspecting there is a mux that routes the display traffic to either the external hdmi port or to the local display. Schematics will be helpful.

Sir lcd was changed with working one, lvds was also replaced, but same result,
I could not found its schematic, so unable to check lvds connector pin volts

[usyusy]

Re: Hp probook 6570b only external display

Integrated HD4000 or AMD graphics?

If AMD graphics probably there is the problem

Sir Intel HD graphics

[mon2]

Re: Hp probook 6570b only external display

Are there any labels or markings on the display?

Post all details here. Perhaps there is a public datasheet that will help to determine the voltages on the display connector.

[usyusy]

Re: Hp probook 6570b only external display

Are there any labels or markings on the display?

Post all details here. Perhaps there is a public datasheet that will help to determine the voltages on the display connector.

in the start, i saw CMOS battery error
but as i was using charger, so in neglect it
other pics are as follow.

[Stevedb]

Re: Hp probook 6570b only external display

Hi here shematic if it is the right one.

Good luck

Regards

[usyusy]

Re: Hp probook 6570b only external display

Hi here shematic if it is the right one.

Good luck

Regards

Thank you sir, its the one

[usyusy]

Re: Hp probook 6570b only external display

Lvds connector pins and surroundings components were checked, some have values others are not, the findings are attached in pic along with schematic pic.,., any guidance please

[Stevedb]

Re: Hp probook 6570b only external display

Hi i would look to the lidswitch first. Test the lidswitch. You need 3,3v. Also measure the resistance tobground where you got 0v and share it here.
Good luck

Regards Steve

[usyusy]

Re: Hp probook 6570b only external display

Hi i would look to the lidswitch first. Test the lidswitch. You need 3,3v. Also measure the resistance tobground where you got 0v and share it here.
Good luck

Regards Steve

sir i dont know what happened, but the display has come. the values of

>> lid_switch is now around 3.18V on D33 diode, earlier it was 0.03V
>> on IO Pin No. 64, is also 3.18V earlier it was 0.03V
>> as per schematic, the lid switch value on the Hall Switch IC (U1002-as shown in attached pic) is also 3.18 V

For knowledge seeking, what can be the reason if lidswitch volt is missing.

[Stevedb]

Re: Hp probook 6570b only external display

Maybe cold solder joints somewhere. Try ti tenew solder joints on the circuit.

[M4n0l0307]

Re: Hp probook 6570b only external display

Hi here shematic if it is the right one.

Good luck

Regards

Thank Friend !