iFly GPS portable will not power on or keeps rebooting

iFly GPS portable will not power on or keeps rebooting

An iFly GPS portable that will not switch on, or that restarts by itself, is usually a battery or power-supply problem rather than a failed unit. These checks sort out most cases at home.

Will not power on

  1. Find the battery switch on the bottom of the unit and turn it off.
  2. Plug the unit into its power supply.
  3. Turn the battery switch back on and leave the unit charging: a few hours normally, overnight if the battery is completely flat.
  4. Try powering on. A unit that comes up and holds its charge afterwards is fine.

Keeps rebooting

  1. Turn the battery switch off and run from external power only. If the rebooting stops, the battery is failing.
  2. Power the unit from an AC adapter at home. If it is stable on AC but reboots in the aircraft, suspect the DC power cord or the aircraft's power outlet.
  3. Gently wiggle the power cord at the unit. If that triggers a reboot, the power port is loose or damaged.

Power specifications

Useful when replacing a cord or wiring a battery pack. The 740b and older units share these values.

Power input12 V DC, 1.5 A
Power plug3.5 mm outer / 1.35 mm inner barrel, 9 mm long
Battery pack plug5.5 mm / 2.5 mm barrel
Aux audio jack100 Ω output impedance
Typical current draw (740)About 850 mA with the app running, full brightness, Wi-Fi on and battery charged
Maximum current drawAbout 1.2 A while charging a flat battery at full brightness
Screen off or fully dimmedAbout 400 mA. Turning Wi-Fi off saves only about 10 mA

Sizing an external battery: a 12 V pack rated at 1.5 A or more with the 5.5 × 2.5 mm plug will run a 740 for roughly its capacity in watt-hours divided by 10.

Still stuck?

Battery and power-port replacements on the 740 and 740b are bench repairs. Email support@iFlyEFB.com with your serial number and what you found in the checks above.