⟐ Answered November 20, 2025 at 6:12 MST

⟐ Answer edited October 27, 2025 at 8:30 MST

⟐ Commented May 30, 2025 at 0:24 MST

Checked power supply output, OK. Replaced battery. Still will not power on. Tested RAM, OK. Fans do not spin when power switch is pushed. Conducted some cursory testing of the mother board with DMM and found voltage. So, power is getting to the motherboard. What could the problem be and what else should I look for?

N550jvASUS ROG N550JX Repair GuideAsus N550JA RG Schematic

Yes, it is confusing. What I posted are the only diagrams I can find for the ASUS N550 series. If you know of a source for diagrams and a service manual for an ASUS N550JK-DS71T, I would be grateful. And thinking that the issue might be the power switch, I purchased a replacement on ebay. The laptop won't power on with either switch. These images are of the insides of the laptop with and without components installed. The spreadsheet is the results of measuring the test points on the motherboard diagram, which hopefully is similar to the JK. The tests were done with the power supply connected and with it disconnected. Booth the battery and the CMOS battery have been replaced.

⟐ Commented April 09, 2025 at 13:38 MST

Laptop turns on but screen not displaying due to back-light off

These are the images of my motherboard

New image

These are two new images , help me identify the areas I have to measure

⟐ Answer edited January 21, 2025 at 17:38 MST

I was expecting that Windows 10 recognizes the new Bluray reader. Both, new and old one are form Hitachi-LG Data Storage.

I have tried this already:

• Driver updates from Windows Update → no updates needed
• ODD Auto Firmware Update from Hitachi-LG (https://hitachi-lg.com/en/support/firmwa...) → The optical disc drive already has last firmware
• I confirmed in the BIOS if the SATA configuration was ok, I can only change the SATA Mode from AHCI to IDE, so I let it on AHCI

is the laptop too old to use the Bluray drive, althought is SATA?

Any suggestion?

Thanks a lot for your support!!

I found the "Super Multi Blu Install Disc" (in the hope to find the Bluray drivers) → https://archive.org/details/super-multi-..., and ran the "BD advisor":

⟐ Answer edited December 14, 2024 at 1:10 MST

⟐ Answered September 27, 2024 at 6:28 MST

⟐ Answered July 29, 2024 at 18:11 MST

After closing Chrome as prompted in the Kaspersky dialog, still the update fails.

Six or more Chromes are listed in Task Manager. Attempts to End task on any of these gives an alert saying that Pocket or Kaspersky etc. is crashing, so I back out.

Every attempt to uninstall Java gives an alert telling me that something (doesn't say what) is already in the process of being installed and asking me to try again later. Always the same. Never happens.

What's going on here?

⟐ Commented July 15, 2024 at 0:03 MST

⟐ Commented March 10, 2024 at 6:41 MST

⟐ Answer edited January 23, 2024 at 8:13 MST

It is not working properly

No screen activity while it charging well but no screen active

⟐ Commented November 08, 2023 at 6:13 MST

my laptop (Asus N550JK, with touch screen - digitizer on the top of a matt lcd) Lcd broke down few weeks ago (purple/green tint etc) after some test i got convinced that the screen was faulty and decided to change it.

The screen is lg philips lp156wf4-sph1 (written on it) and it seems to be matt and IPS, so i ordered one online and installed it (I received a BOE screen), the display "works" but there is no backlight.. so i don't see anything, appart if i put a strong flash on it..

I find another seller, order another screen.. i receive the same screen.. same issue ! no backlight..

I dont know what is the problem, the when i pug in the former damaged screen (an LG philips) the backlight works smoothly (but the screen is broken heh.. as the former still has backlight, issue does not seem to come from motherboard, or lid switch)

What could be the cause of it .. ? Thanks in advance for your precious help

⟐ Answer edited May 24, 2023 at 15:37 MST

⟐ Answered November 19, 2022 at 13:41 MST

First of all, I’d like to say that I’ve found already many useful guides on this forum and I’d like to thank everyone!

This time I’ve decided to write a post, as I have a bit peculiar situation with my laptop, which has recently fallen down and seems to have gotten damaged.

The laptop unfortunately fell from approx. 1.5m. After the fall, the screen was still displaying image, but the image was stuck. I force shut it down and when I turned it back on, the screen was not displaying anything anymore (not even the backlight turned on). I visualy inspected all internal parts to check whether any of them were in any way damaged, or if any connectors were loose. Everything seemed fine. Also the screen seems perfectly fine. I tested the hard drive on another computer and it works fine. However, still after turning the laptop on, the screen is not responding. Alongside that, the fan is acting funny, turning repeatedly on and off in the first 20 seconds after turning the laptop on and then starts cooling fully (not sure if this is normal fan behaviour). The flight mode indicator light gets turned on, but the hard disk reading indicator light does not flicker like it usually does.

After disconnecting the screen’s connector and connecting the laptop to an external screen there was still no image.

What could be the underlying issue for these problems?

Thank you a lot in advance for every kind answer and help.

Manja

Attaching image of the board. The screen’s cable is intentionally disconnected to allow getting a clearer picture.

⟐ Commented September 07, 2022 at 6:22 MST