Windows 10: After replace my motherboard at hp 255g5 laptop, when turn on, display is black and...

Not turn on bios after replace motherboard.

:)

 

My hp laptop wont turn on

This is a frequent problem am sure as you have already seen from online searches.

Flea power is usually the culprit here, basically its residual power that remains on the computer even after thecomputer has been shutdown. You can drain the flea power with the steps the other answers have suggested.

• Disconnecting the battery and adapter
• Press the hardpress the power button for 30 seconds
• This should clear the flea power

If this doesnt work, read this article its about
a dell inspiron but the same applies for you hp. It has some detailed step by step instructions

 

Hp laptop screen won’t display except occasionally

I would like to note that step 20 comes up with no files. Perhaps this could be the source of the issues?

 

Hp laptop screen won’t display except occasionally

- this suggests BIOS corruption or a hardware problem...
Whilst you might try flashing the BIOS (updating it may be necessary to run Win 10- witness your problem above), you also say you have access to it.
Do you hear any beeps or sounds?

Try steps 1,2 here:
Laptop freezes at HP logo without loading circle - HP Support Forum - 5997641

Check the version of your BIOS vs that listed on HP's site for your laptop.

I'm also wondering if this might be related to your CMOS battery inside your laptop. (This should be a normal circular battery).
How to replace the CMOS battery
- but that's just a thought.

Worth asking on the HP forum.

================================
Sorry that's not how to create a bootable disk. All that disk is is data storage- as you just copied the files to it.

Please see:
How to Create a Bootable DOS USB Drive
for one way to do it using a free program.

However, given the above, doing that isn't likely to help you I'm afraid.