Computer Repair Guides

iMac Startup Power System: Sleep-wake state latch | Auckland

The Mac appears dead after sleep but behaves differently after all power states are cleared. Identify the external-adapter or internal-supply design, then distinguish startup activity from a built-in display or...

On by AEPC / AKL East PC 0 Comments

iMac Startup Power System: Firmware recovery state | Auckland

Power is present but the Mac remains black or repeatedly enters recovery behaviour. Identify the external-adapter or internal-supply design, then distinguish startup activity from a built-in display or backlight fault.

On by AEPC / AKL East PC 0 Comments

iMac Startup Power System: Power-button signal fault

The normal button action produces no response despite confirmed standby power. Identify the external-adapter or internal-supply design, then distinguish startup activity from a built-in display or backlight fault.

On by AEPC / AKL East PC 0 Comments

iMac Startup Power System: Shorted always-on rail | Auckland

The power supply cycles or standby current is abnormal before startup. Identify the external-adapter or internal-supply design, then distinguish startup activity from a built-in display or backlight fault.

On by AEPC / AKL East PC 0 Comments