Check to make sure RAM is properly installed (can be displaced if dropped or hard bang). Check for abnormal smells or fried components. If there are no signs of life, open bottom cover and check for liquid damage - corrosion/residue on logic board, cables, connectors, inside bottom cover, flex cables, etc.If you see a picture on the front of display where the light is shining in (login screen, desktop, loading progress bar, etc.), the backlight is bad and logic board repair/replacement should be considered.
#Macbook pro gpu panic diagnosis mac#
If Mac is booting (chimes, signs of light, but no display), check to see if backlight is bad by shining a flashlight through the Apple logo on the other side of display.If does, it is most likely a damaged screen.
![macbook pro gpu panic diagnosis macbook pro gpu panic diagnosis](https://www.irepairs.es/wp-content/uploads/2018/12/graficaa2.png)
![macbook pro gpu panic diagnosis macbook pro gpu panic diagnosis](https://www.macupgrades.co.uk/store/images/guides/bypass.jpg)
Have the proper tools ready and available - known good/functional spare parts, Shiny diagnostic boot drives, external monitors, proper adapters, known good keyboard/mouse, etc.
![macbook pro gpu panic diagnosis macbook pro gpu panic diagnosis](https://cdn11.bigcommerce.com/s-8a335u/images/stencil/1000x1000/products/78/764/DSC03449_copy__95339.1565937111.jpg)