UNSOLVED
T
THUSITH_WIJE
2 Posts
0
1158
January 19th, 2023 02:00
Screen Flicker and Sparkles all over
Screen is flickering as bands on the LCD panel and the flickering place changes every time. A flickering band appears and dissapears random like lightening every now and then. Apart from this, entire screen has very tiny white sparkling dots all the time. These flickering bands and sparkling dots appear even on BIOS screen. But flickering reduced to few occational ones when entered into BIOS. Only few times during the entire On-board Diagnostics process. No issue found by On-board Diagnostics.
Heavy flickring as soon as boot-up started when DELL logo is appeared on the screen.
video - sparkling dots on screen
When refresh rate changed from 60 to 48, flickering stops temporary. But again, reappear after waking up from sleep or restart.
When LCD BIST is run, no flickering happened. Colors displayed correctly.
BIOS are up to date as well as Windows.
Laptop came with Windows 10 and even then, both problems were there.
Any suggestion to fix this?
Thanks
THUSITH_WIJE
2 Posts
110
0
Posted January 20th, 2023 06:00
uninstalled DELL graphics drivers, then tried Intel iRISx drivers and even Windows generic drivers, Problem is still the same. Only workaround found is changing the refresh rate. Changing from 48MHz to 60 and again dropping to 48 minimizes the flicker for few hours or until next boot/wakeup from sleep.
I had this issue with my users Precision 5680. Monitor flashes and had tiny artifacts on the ultra wide screen external monitor. It went away for months. We got her office remodeled, and when I moved her back, the issue came back. Her battery also sometimes goes totally dead and you have to hard reset the laptop, and reset/power cycle dock to get it working again. One USB-C sometimes is not illuminated. I tried:
Issue precisted when:
- Tried a different power strip
- Power cycle and reset dock
- Plugging her into a different outlet in the office
- A power conditioner power strip
- Updating all software per Dell Command
- Replaced her motherboard (twice)
- Reimaged
- Tried a different performance dock
- Tried a different monitor
- Other periferials were eliminated (conference speaker, LED light, cell phone USB charger)
- Reset BIOS
- Power plan adjusted
- Refresh rate adjusted
- Turned off deep sleep
- Disabled fast boot
- Uninstalled USB hub driver
Issue did not precist when:
- Plugged a 5511 into the dock. User used this as a spare for weeks with no issues.
- Tried a similar model laptop on the user dock
- Tried the users laptop on a different dock
- Plugged the user back into her original dock
- Eliminated space heater
Issue went away when:
- Rotated the dock USBC cables 180 degrees
- Simply docked a different PC, then docked the users PC
(edited)
confuseduser43
4 Apprentice
•
591 Posts
116
0
Posted January 19th, 2023 11:00
Hello,
That is usually caused by a graphics driver issue Troubleshoot screen flickering in Windows if these steps do not help replace the lcd display assembly.