HP Laptop (Notebook) 15-F305DX - Monitor or Mobo Issue

[Label07]

I had a friend bring me a HP notebook to look at.  He said it locked up on him, LCD screen had minor pixilation at the time of, after a while it restarted, but would not load windows.  He was not doing much, browsing Facebook at the time with not many running programs in the background.

We turned it on, and it did load windows 10 this time. Auto-logged into his account.  Were able to navigate around windows, use chrome, disk usage was stated to be 100% yet, opening and closing programs didn't seem to be affected by the high DISK percentage.

I started a SFC /scannow in CMD Prompt.  I clicked on one of the chrome tabs and what he had described now happened to me.  Slightly pixelated screen, locked, up, cannot access task manager or do anything.  I let it sit, around 10minutes later it rebooted itself, no BSOD.

Used DEL to get into BIOS, started the self-tests, upon getting to DST the screen went completely blank, like no power was being fed to it or the LCD had completely died.  Weird, since DST is not testing that hardware.  After each reboot from then on the screen is dark and blank upon supposed startup.  I can see a power light on the wifi-button, so there is power being supplied to the Mobo and the notebook seems to be booting.  I can hear the fan running.

I removed the HDD after tedious disassembly of the Notebook (-_-), used another PC to get his profile from the Notebook HDD.  Reinstalled the HDD back in the Notebook, all connections (ribbon cables) are secured.  Boot the Notebook and still same symptom.  LCD is black, with seemingly no power being supplied to it, MOBO appears to be on and running.

In your opinion; is this a MOBO or LCD screen issue?  Suggestions?

[asmita6658]

Hi @Label07

Welcome to the HP Support Community. 

Appreciate you trying the steps. This would confirm a hardware issue. I'd suggest you Contact HP in your region regarding the service options for your computer.

To isolate the problem, try connecting the computer to an external monitor. If the display comes on the external monitor, then it is an issue with the display. 

You may also refer to this guided troubleshooter - HP PCs - No Power or No Boot Troubleshooting

Have a great day!

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[Label07 · Accepted solution]

Turns out this was my mistake.  I didn't realize that either HP or laptops in general require the one stick of default memory to be installed in a dedicated slot.  I had moved the memory from the default to the secondary in case my friend wanted to add a duplicate stick.

Once moved back to default slot, issue resolved.  Have yet to encounter this, especially on desktop PCs.