ACMT Display & Video Troubleshooting 3

Question 1

A customer's Mac is connected to a 4K display but it only shows at 1080p. What should the technician verify?

Accepted Answer

Whether the cable supports 4K resolution and whether the correct resolution is selected in Displays preferences

Answer

The display's power cable

Answer

The macOS version only

Answer

That Night Shift is disabled

Question 2

Which technology allows Apple Silicon MacBook Pro models to connect to up to four external displays?

Accepted Answer

Thunderbolt 4 with DisplayPort Alt Mode and a Thunderbolt dock

Answer

Mini DisplayPort daisy chaining

Answer

USB 2.0 video adapters

Answer

Built-in HDMI only

Question 3

A MacBook Pro with dedicated GPU shows distorted graphics only when the dGPU is active. What does this indicate?

Accepted Answer

The discrete GPU (dGPU) on the logic board is failing

Answer

The integrated GPU is faulty

Answer

The display cable is damaged

Answer

macOS needs to be reinstalled

Question 4

How can a technician force a MacBook Pro with dual GPUs to use only the integrated GPU for diagnostic purposes?

Accepted Answer

Navigate to System Settings > Battery and disable 'Automatic graphics switching', or use gfxCardStatus

Answer

Boot into Safe Mode

Answer

Reset the SMC

Answer

Run Apple Diagnostics

Question 5

A Mac mini's display output shows no signal on an HDMI monitor. The monitor works with another device. What should the technician try first?

Accepted Answer

Try a different HDMI cable and verify the Mac mini is powered on and awake

Answer

Replace the Mac mini's logic board

Answer

Replace the HDMI port

Answer

Reinstall macOS

Question 6

Which display technology used in modern MacBook Pros provides extreme contrast ratios by locally dimming sections of the display?

Accepted Answer

Liquid Retina XDR display using mini-LED backlighting with local dimming zones

Answer

IPS LCD with standard backlight

Answer

OLED panel with per-pixel dimming

Answer

Twisted nematic (TN) panel