HP 250 G8 GPT52 La-k202p backlight problem

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • sopik78
    Badcaps Veteran
    • Nov 2013
    • 517
    • Czech Republic
    #1

    HP 250 G8 GPT52 La-k202p backlight problem

    Hello, I have an issue with the backlight on my HP 250 G8 laptop. Here are the voltage readings:
    • INVPWR_B+: 19V
    • +LCD VDD: 3.3V
    • INVTPWM: 3.3V
    • It does not have a touchscreen.

    Could someone advise me on what else to measure? I've already tested two different LCD panels.
    ​


    Click image for larger version Name: image.png Views: 918 Size: 56.7 KB ID: 3252811
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      DISPOFF# reading?

        Comment

        • sopik78
          Badcaps Veteran
          • Nov 2013
          • 517
          • Czech Republic
          #3
          Sorry. my mistake:

          INVTPWM 0.67V
          DISPOFF# 3.2V

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14631
              • Canada
              #4
              INVTPWM 0.67V
              Low inverter backlight voltage. At 3v3 the backlight will be 100% on.

                Comment

                Previous template Next

                Related Topics

                Collapse
                • Dobrowol
                  Asus GA402RK keyboard and kb backlight problem
                  by Dobrowol
                  Hi. I have a problem with Asus ROG GA402RK. The keyboard suddenly stopped working along with the kb backlight. I replaced the keyboard and the ITE KBC chip and the problem is still the same. I don't see any passive elements that look damaged. Does anyone have an idea?
                  04-28-2025, 04:30 PM
                • ononos
                  LG M2362DP Backlight problem
                  by ononos
                  hello everyone!
                  As the title states i am an owner of an LG flatron M2362DP 23 inch monitor Tv. Since i currently use it as a tv i'm posting the problem on the "troubleshooting tvs and video sources" section.
                  I'm from Greece so English isn't my native language, so please forgive me for any mistakes i make. I have basic knowledge in electronics, and although i have a degree, many things have changed since i finished a 2 year coarse (over 30 years ago). Occasionally i repair easy stuff, mostly things that break at home like appliances.

                  So i decided to try to...
                  03-12-2023, 05:05 AM
                • fanaticgames
                  Samsung UE32D4010 Backlight problem, led ok
                  by fanaticgames
                  hello I have a backlight problem on this TV, if I unplug the cn201 cable the backlight works perfectly and the voltages are 13v if I connect the cn201 cable the backlight goes off and the voltage drops to 12v, I assume it's a motherboard problem, the question is has anyone had a similar problem? I want to understand if the motherboard is repairable or it's not worth wasting time...
                  02-22-2023, 09:46 AM
                • Honziq
                  Backlight problem - Asus M3200WU, board Gapal LA-L291p
                  by Honziq
                  Hello,

                  I have this All-in-one PC, after SSD change there is no picture. I was found out it is a backlight problem, but LEDs are OK. There is 4 led strings each working on 42,4V, but from board is comming only 5V.

                  I was repaired many backlights before but this design i will not understand.

                  For me it looks like it is waiting for some signal from screen to start up the backlight or something like this. Nothing seems to be damaged or shorted here.

                  Can someone explain me please what to do, what to check?

                  Thanks....
                  11-20-2024, 01:24 PM
                • grbo92
                  Backlight problem Acer LA-031P
                  by grbo92
                  Hi,

                  i have one acer Nitro 5 without backlight on my desk.

                  Mainboard model: LA-L031P GH53Z REV 1B

                  Attached schematics and boardview are REV 1A, slightly different as REV 1B.

                  11411_LA-L031P-Acer_Nitro_5_AN515-45_AN517-41-GH53Z_Rev_ (1).zip

                  Repair history: customer cleaned dust and changed thermal paste, shortly after that there was no light

                  Notebook boots without problem and shows only image without backlight, HDMI output working. Optical inspection done, no burned or broken components. Tested also with a new display module....
                  09-09-2024, 03:49 AM
                • Loading...
                • No more items.
                Working...