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  Acer Nitro 5 AN515-54. displays on the external monitor and works fine, the issue is NO display on the internal screen

  by DqMagetz

  Good day!
  I have a customer's laptop — Acer Nitro 5 AN515-54 (EH5VF - LA-H501P). It has a display on the external monitor and it's working fine, but the issue is NO display on the internal screen. I already replaced the eDP cable and checked the LCD connector pins.
  
  Here are the voltage readings:

  • Input – 19V (stable)
  • +LCDVDD – 3.3V briefly, then drops to 0V
  • EDP_HPD – 3.3V briefly, then drops to 0V
  • PCH_BKL_PWM – 2.2–5V briefly, then drops to 0V
  • EC BKOFF# – 1.8V briefly, then drops to 0V
  • PANEL_OD_EN – 0.3V

  
  Is it possible that the EC chip is corrupted or damag...

  

  2 Photos

  • Channel: Troubleshooting Laptops, Tablets, and Mobile Devices

  Today, 09:37 PM
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  Acer Aspire 5 A514-53 bios file needed

  by salawayon

  no display problem on this one also.
  
  board info:
  NB2593_MB_V1...

  • Channel: BIOS Requests ONLY!

  05-03-2021, 12:35 AM
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  New Members - please post your introductions here

  by petabyte

  As this is a brand new forum, I thought I'd open up a thread to encourage new members to introduce themselves a bit.. now hey.. let's not get too personal.. ok ?
  
  And if you wouldn't mind to keep this thread \"clean\" let's try to keep the the chitchat (i.e. even the welcome to the board replies) to a minimum or this thread may get to 100 pages fast
  
  So I'll start things off :
  
  My name is petabyte and I'm a forum junkie. :oops: I've been off the wagon for a number of years and countless times I've tried to stop but it's useless.....

  • Channel: Announcements & Related News

  10-09-2003, 02:21 PM
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  [Help] Lenovo Yoga Slim 7-14ARE05 (DA0LS3MBAF0) – 25Q80DVN1G Flash Is All FF, USB-C PD Stuck at 5V

  by ekozeko333

  Hi all,
  I’m trying to recover a Lenovo Yoga Slim 7-14ARE05 with board DA0LS3MBAF0 Rev:F. I’ve run into an unusual issue where USB-C PD is stuck at 4.7–5V and the system won’t boot (keyboard lights flash briefly, then nothing).
  🔥 The Problem Started After Suspected ESD/PD Fault
  I experienced a power issue or ESD event through a USB-C charger
  After that, the NX20P5090 power switch was visibly burned and was replaced
  Now the PD controller always negotiates 5V @ 2A, even with known-good chargers
  🧠 What I’ve Done So Far
  Flashed...

  • Channel: BIOS Requests ONLY!

  06-21-2025, 02:48 AM
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  yx-305d bench power supply decreasing voltage problem

  by ashan000

  This power supply is 30v 5amp. Problem is when turned on after about 3 minutes voltage starting to decrease slowly. (like - 5.8 > 5.7 > 5.6 > 5.5) can't see any damaged component or dry solder joints. Checked main 2 transistors with multimeter. Reading seems ok. Tried changing potentiometers(both coarse and fine) still the same situation. Can any one help me to troubleshoot? What voltages to check? Any ideas helps to fix this. thank you.!
  ​...

  • Channel: Troubleshooting Power Supplies and Power Supply Design

  Today, 08:43 PM

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