screen shadow lines when displaying black image and back to normal when displaying bright colors

[you9_]

Allready, laptop can detect connection from hdmi but don't show anything, just blank.. and my thunderbolt port always restart the connection every 2 second.. 🥲

[ub6424]

Hello @you9_ 

What are the results of HP Diagnostics tests ?

[you9_]

i try to test system and componen, all the result is good, don't have any problem. 😞

[ub6424]

Hello @you9_ 

Do you have valid HP warranty ?

[you9_]

Allready expired, 🥲🥲

[ub6424]

Hello @you9_ 

Recommendation and solution

In your case: Service is required !
- The computer should be disassembled and checked.
- [Always recommended] Thermal paste for CPU GPU and bridges should be renewed
- [Always recommended] The function of the fan(s) must be checked

- The internal display cable that goes from motherboard to screen has to be checked or replaced

- The screen has to checked or replaced

- Short circuit test

- Charger / battery should be checked

- General cleaning ...

HP warranty expired:

You should have it serviced by a professional notebook (chip level) repair store.

Maintenance and Service Guide

From Page 32 Chapter 5 Removal and replacement procedures

Good luck

[you9_ · Accepted solution]

Thankyou for helping me.. we start the experiment now, HP service Center is too far from my place, so i try to fix it with my friend, i will tell you if we allready rfix the problem and what we doing to fix it🙏🙏