Laptop screen black but boots up

[Sleepylit]

Hi I have a HP Spectre x360 14 Convertible PC 1Q881AV which had been working but recently I tried to use it only to find out that the windows seems to be working and booting since I can see windows hello doing it thing and I hear it log in but my screen remains to be black I tried resetting but still just remains black I'm going to try to let the battery drain and be powered off for a couple of days and try it again soon also I haven't messed with anything inside since I think the battery is glued on 

[BeemerBiker]

Does the BIOS post show  up?

Check to see if there is a hardware problem.

Tap the ESC key after powering on. Tap it once a second after you see the LEDs on the keyboard flash. When you see the startup menu, press F2 to run diagnostics.

If there is no BIOS or UEFI diagnostics display then there is a hardware problem.  Bad cable to screen or the screen is bad.  it could also be a motherboard problem but if an external monitor works then the motherboard is probably good.

Attach an external display and run the latest UEFI diagnostics

HP releases newer UEFI diagnostics periodically.
When you select F2 during boot you are requesting UEFI diagnostics.
There is an updated diagnostics package Click Here
Look for the phrase 'issues outside the OS',
Expand the '+' symbol and click the DOWNLOAD button.
The version of the UEFI diagnostics is shown at the left of that DOWNLOAD button.
When you press F2 to run diagnostics please ensure the version is the new one.

This can be installed from a USB flash drive if necessary.

[Sleepylit]

Okay so I managed to drain the battery and plugged it in (both ports) they seem fine to charge the device since I get the orange light as it charging I also just noticed when I press the power button I get a 3 blinking lights on the side didn't realize it earlier since I was in light but anyways I'm starting to think it's a hardware issue as well so now I'm not sure what to do since Im pretty sure im out of warranty should I try to open and repair it myself or try contacting hp

[BeemerBiker · Accepted solution]

Laptop cannot boot but you see lights or might hear the fan

Remove cover plate to get access to the memory. If there is no cover plate then search YouTube for a disassembly video.

First blow out as much dust as you can before removing the memory. Once motherboard area is clean, then discharge static electricity by touching a finger to metal frame or case before removing memory sticks.

Clean the memory contacts with eraser, use air duster, reseat memory. Reseat one at a time if necessary.

Before powering up the system, be sure to go into the BIOS setup and press F7 or whatever function key is used to set the defaults. Set the date and time, enable secure boot, and be sure to save settings before exiting.

Hard Reset
Hold down the power button for 20 seconds. Press one more time if necessary to start the laptop.

If it does not start then look for blinking LEDs or listen for beep codes.

Click here for Laptop codes

[Sleepylit]

Hey thanks so much for the help I managed to disassemble it and I unplugged the battery and then proceeded to unplug the screen cable then from there I tried turn on the laptop and got video so then I reassembled the laptop as of now no issues so I think the screen cable might have been loose or something