File Request Black screen on startup on HP ZBook 15 G3 APW50 LA-C381P REV 1B (2017-03-29)

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abdilbaasid

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MotherBoard Model
APW50 LA-C381P REV 1B 2017-03-29
Laptop Model
HP
Hello,
I have an HP ZBook 15 G3, with a motherboard model number APW50 LA-C381P REV 1B (dated 2017-03-29).
When I start it up, the LEDs light up, the fans spin, and the keyboard backlight comes on then goes off, but the screen remains black. What could be the problem?
I've attached a dump of the three chips (16MB, 8MB, and 1MB).
Thank you in advance for your help.
 

Attachments

  • 1 MB.bin
    1 MB · Views: 1
  • 8 MB.bin
    8 MB · Views: 0
  • 16 MB.bin
    16 MB · Views: 0
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abdilbaasid

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Vahab Hemmati said:
just program 16MB clear file :

Click to expand...
Thank you,

I flashed the file into the 16MB chip, but now the computer's behavior has completely changed .
As soon as I plug in the power adapter, the power on-off button light, the Caps Lock key light, and the charging indicator light all flash continuously, as the video I posted.
And this time, the fans aren't spinning, and I still have a black screen.
 

Attachments

  • VID_20250930220149.mp4
    29.7 MB
  • VID_20250930220230.mp4
    25.2 MB
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abdilbaasid

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Vahab Hemmati said:
that file is tested working
Click to expand...
I'm getting back to you because unfortunately my problem is still not resolved.
I flashed the three files for the 1MB, 8MB, and 16MB chips you sent me, and the problem is still there:
The power LED and the charger LED light up.
The fans are spinning.
Black screen.

I tried changing RAM sticks, putting them in the different free slots, and connecting the computer to a TV with an HDMI cable (no signal message).
 
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abdilbaasid , Vahab Hemmati , ryspal12 , Salimeh Bolboli , wefixall

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