is my graphics card faulty
Hello
I recently started noticing some issues with my mid 2012 MacBook pro retina 15. Sometimes when i open my laptop from sleep mode i started getting some grains on the screen. After 2 seconds the screen will be back to normal.
(the above image which i have attached is not my laptop screen, but I have attached it as I couldn't take a picture of mine when the issue happened)
My battery has crossed 1350 cycles and I was going to replace the battery this month. I don't know whether it is problem with battery or graphics card or drivers. I saw a similar post in which they told it might be an issue with graphics card. So i ran a hardware test and i found no issues with my hardware.
Could anyone please help me to identify the issue. Thank you
macOS Sierra (10.12.2), null