Hp 15n da0u81mb6c0 laptop no display

[sureshbobby]

Dear Friends
am having hp 15N with DA0U81MB6C0 motherboard which is not working.
Laptop is powering on and fans are running. but no display,
please tell me the voltage points to check and troubleshoot


Thank you

[raajkumar]

Re: Hp 15n da0u81mb6c0 laptop no display

Check voltages on Coils ( Gray square components ) around CPU.

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

Yes
PL13-1.1v
PL14- No voltage

[raajkumar]

Re: Hp 15n da0u81mb6c0 laptop no display

I suspect PU4 or PU3 or both. So check voltages according with Schematic.

[Rashid36]

Re: Hp 15n da0u81mb6c0 laptop no display

Bro try bios only........

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

Hi bro
Am using MINIPRO TL866a programmer, Unable to flash the bios or read the bios. is it compatiable or i have to use another programmer.
If yes please suggest me a good programmer.

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

Dear Raajkumar,
I will check the both PU3 & PU4 and let you know

[Rashid36]

Re: Hp 15n da0u81mb6c0 laptop no display

Hi bro
Am using MINIPRO TL866a programmer, Unable to flash the bios or read the bios. is it compatiable or i have to use another programmer.
If yes please suggest me a good programmer.

Bro i'm using EZP2010

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

Hi Bro My motherboard model is DA0U81MB6C0
QUANTA U81

[udai]

Re: Hp 15n da0u81mb6c0 laptop no display

flash bios .check blinking in k/b

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

Hi Udai,
Thank you. but i was unable to flash bios with my Bios programmer TL866A
will you guide me

[mcplslg123]

Re: Hp 15n da0u81mb6c0 laptop no display

check whether its a 1.8v chip. If so, you will require 1.8v adapter

[sureshbobby]

Re: Hp 15n da0u81mb6c0 laptop no display

I cannot program both main and ec bios, Please suggest me

[Shamsi]

Re: Hp 15n da0u81mb6c0 laptop no display

Same problem to me also.Both bios flashed.but no vcore coming.1 caps lock blinking

[piernov]

Re: Hp 15n da0u81mb6c0 laptop no display

Missing S0 rail and/or ALL_SYS_PWRGD maybe.

[ravi_1617]

Re: Hp 15n da0u81mb6c0 laptop no display

Hi, Same board,DA0U81MB6C0 with graphic -no display.
Found U24 Audio and U9 Lan chip heating removed both , but still no display.
U23 Intel seems heating bit more along with heat-sink around 50-55 max. Should i replace intel.
power at coils seems normal.PL13 1.1volt .no 0 volt at PL14.
Looking for bios with graphics. felt webcam also heating.

Please Guide me.
Thanks

[mcplslg123]

Re: Hp 15n da0u81mb6c0 laptop no display

Very likely a shorted pch on usb section. check reistance on D+/D- on usb port.

[ravi_1617]

Re: Hp 15n da0u81mb6c0 laptop no display

Thanks i will check and update

[ravi_1617]

Re: Hp 15n da0u81mb6c0 laptop no display

Very likely a shorted pch on usb section. check reistance on D+/D- on usb port.

Cheaked D+/D- showing 5.5 to 5.9 Meg-ohms .

[mcplslg123]

Re: Hp 15n da0u81mb6c0 laptop no display

Audio/Lan/Webcam -all controlled by PCH. So i doubt some damage to PCH itself. USB resistance is fine though. PIN3 of PU4?? Disconnect webcam and try to boot. Is there display?