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Hello , for some time I was studying Quanta U9x/8x schematics and the option to use both type of screen (LVDS 40 pin / eDP 30 pin).
In some cases to use LVDS screen PCB use converter IC RTD2132/6
Now I found an HP 15 F series U99 mainboard with RTD chip not populated and LVDS 40 pin lcd touch screen
at the same time I have another HP 15 N series with Quanta U92 mainboard and RTD2136 with eDP 30 pin lcd screen (no touch).
Maybe someone more experienced in the subject can clarify if is posible to change type of screen used with some resistors / bios options change.
...11-25-2023, 09:31 AM -
Hello, I'm trying to repair an HP 27 Quanta N76 (DA0N76MB6E0 Rev E).
I only get 3.3V, 5V, and 1.05V; no other voltages.
I tried the BIOS and changed the KBC. The KBC self-programmed upon power-up after changing it.
The VR-On is missing for NCP81220, but 1.2V is also missing for DDR4, so 1P2V_PWRGD is low. SUSON or DDR_VTT_EN are not present on the DDR4 voltage regulator (RT8231BGQW). It seems the KBC isn't triggering these signals.
I'm using the Quanta N91 schematic, but there are too many changes that make it nearly impossible to measure signal...07-14-2025, 02:20 PM -
Hello, everyone!
I need schematics of this board:
Model: Dell Inspiron 14z-N411z
Board No: DA0R05MB8D2
REV: D
Quanta project: R05
I have already seen the file ''quanta R02_UMA.pdf'' in this thread:
https://www.badcaps.net/forum/showth...dell+14z-n411z
but it is differ from R05_UMA and it can't help me in my case.
The main problem of the laptop is as follows:
LED backlight is absent in the screen and appropriate 36's contact of the LVDS 40pin 1ch connector is shorted... -
I search the boardview or schematic for Quanta H9R DA0H9RMBAF0 Rev F BoardView
pls -
I have an HP gaming 15-0013dx laptop , motherboard quanta G3HA with AMD Ryzen 5 cpu and Nvidia discrete grsphics card. The laptop turns on and u can see the screen polarizing on and off in a loop but no video signal. All voltages are ok measured and stable (I checked all with oscilloscope). This schematics don't have power sequence but I'm using a similar sequence from another laptop with AMD CPU and I get all to the point CPU must release apu_pwrok and apu_rst#, this signal comes valid only for the period of time the screen is polarized and they disappear and same loop behaviour (active/inactive)....
Working...
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