Horizontal RGB lines appearing on black screen (AMD, HP)


#1

Hey,

I have an HP Pavilion 17-g121wm laptop that I recently repaired. I left it with my parents after I moved out and they did something (not sure what) to it. It wouldn’t recognize the hard drive or communicate with it, and I finally got it to work after a new hard drive, SATA cable, and fresh win10 install.

It runs great, except for this graphics issue. It seems like it only happens when it’s been idling a long time. I get a strange black screen where it looks like a white fog over the bottom 2/3 of the monitor, and then RGB pink/green lines run across the top. Once the login page appears, I can SEE the login page through the “fog”. After a restart, it runs fine and the graphics are great. Don’t see a single thing wrong. No overheating, no twitching while the PC is on or while videos or games are running.

Graphics are really out of my jurisdiction, so all I’ve done is install the AMD Adrenaline driver manager and install new drivers. I believe everything is up to date. This isn’t a touchscreen model by the way.

Specs:
HP Pavilion 17-g121wm
Windows 10 Home 64 bit
Processor/graphics: AMD A10-8700P Radeon R6, 10 Compute Cores 4C+6G, 1800 Mhz, 2 Cores
BIOS Version/Date: American Megatrends Inc. F.45, 4/28/2017
8GB RAM
HP 240GB Solid State Drive

In order to get pictures I put it into sleep to try and get it to screw up, but it didn’t happen.

Thanks for any help


#2

I believe I have had similar issues with a cheap RCA tablet that I bought from Walmart a few years back. I only use it for watching youtube in bed before I go to sleep, but every once in a while it will randomly freeze the screen full of pink lines and I have to do a forced shutdown and cold boot sequence for it to work again.

I can only conclude that the issue has to do with cheap hardware, and no amount of Windows/driver updates can fix it. If you have a newer BIOS/UEFI version available it might be worth a shot to update.


#3

Maybe, I don’t know, but I got pictures upon startup:

https://drive.google.com/file/d/1MEzXMmgBd5YJjtwgItb-wnspUQ4clXKC/view?usp=sharing

https://drive.google.com/file/d/1nu8W8k_dAY6sWhgYOUKxN5WuzNWXzveQ/view?usp=sharing

Then it disappeared when the desktop came up, and a Radeon notification appeared:
“Default Radeon WattMan settings have been restored due to an unexpected system failure.”

This is especially confusing because the computer is functional when this happens, I just can’t see it.


#4

That looks really odd, I don’t recall seeing something like that before. Could be the display and not that card, have you tried connecting an external monitor to the laptop to confirm?


#6

Hey, sorry I didn’t respond. I hooked the laptop up via hdmi to a monitor, making sure it was on “duplicate display” mode, and the issue did not show up on the external monitor. It only appeared on the laptop. Don’t know if this hints at hardware or software, but I’ll try contacting AMD.


#7

In that case I would suspect either the laptop display itself, or the connection going to the display from the motherboard (or video card depending on how it is connected internally).