Question HP Pavilion All-In-One Chipset?

[startropic1]

I'm trying to service an HP Pavilion All-In-One, (yes, every tech's nightmare), that is having GPU issues. It's behaving like a 2-GPU setup with the GPU controlling the lower half of the screen on the fritz. Obviously an All-in-One would not have this type of GPU setup.
Inside the machine I could only find one AMD chip, do these systems use CPU/GPU combo chips?
The Chip:

Model numbers:

 

[rgd1101]

since there are more then one hp pavllion aio, the exact model would help.

 

[startropic1]

since there are more then one hp pavllion aio, the exact model would help.

I provided an image of the model number:
It's 23-q112

There are other serial numbers in the image in the OP, as well as an image of the chip I located. Can anyone verify that the chip is a CPU with integrated GPU, (combo chip)?

 

[rgd1101]

it an apu. could be ram issue. or the display.
try an external monitor ?

if it is the apu issue. need to replace the system board. the apu is solder to it

here the spec
https://support.hp.com/us-en/document/c04769586

updated

 

[startropic1]

it an apu. could be ram issue. or the display.
try an external monitor ?

if it is the apu issue. need to replace the system board. the apu is solder to it

here the spec

Um, you forgot the spec link.

 

[startropic1]

Can you even connect this machine to an external screen? It has an HDMI port but I'm not sure that it can send video both ways. I don't have a USB to VGA cable.
In my experience, the symptoms I saw where typical of a bad GPU. There is no visible physical damage to the screen, (inside or out), or the board/APU/wiring.

The owner said symptoms began after a storm, but the machine goes through a setup of two different types of surge protectors.

 

[rgd1101]

other then trying an external screen?
you could replace the ram, then and or the system board.

 

[startropic1]

A quick update, I revisited this machine to verify the correct system board to order, and a little more testing.

To clarify the video problem, the multiple horizontal lines appear from the second I boot it up, long before it ever reached Windows. It's most certainly the system board. The only other possibility is the board for the LCD, but I highly doubt that.

 

[startropic1]

Installed a different main board, but the horizontal lines are still there. This is the internal LCD cable. Is it supposed to be missing those 2 pins? Seems a little difficult to find an exact replacement, but I will keep looking.