How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Russell H. Your Own Question

Russell H.
Russell H., Service Tech
Category: GPS
Satisfied Customers: 9296
Experience:  8+ years of professional experience
Type Your GPS Question Here...
Russell H. is online now
A new question is answered every 9 seconds

My garmin 740 powers up. Just the Garmin lights up and shuts

Customer Question

My garmin 740 powers up. Just the Garmin lights up and shuts back down. Can't proceed with any settings
Submitted: 3 months ago.
Category: GPS
Expert:  Russell H. replied 3 months ago.

Hi, thank you for contacting My name is Russell. I will do my best to provide the right answer to your question.

I would advise you to first consider how old the Garmin device is. If it has been running off the same rechargeable battery inside it for several years or longer, it may have a failing battery that no longer holds charge or delivers insufficient voltage, and causes the device to shut down again immediately.

Or, it may be that the system software on the Garmin device has become corrupted and is in need of updating perhaps.

For the first, you can determine whether that is the problem, by powering it up while it is still on the charger, and if it stays On that way for any considerable period, then the battery is insufficient to power it and needs replacing.

As for the second, you can try to update it by connecting it to a computer with Garmin Express loaded upon it. Garmin Express may be obtained (for either Windows PC or Apple computer) as follows:

Simply download, install, and use Garmin Express.

Go to

and (if you have a Windows PC) click on the big blue Download button at center bottom of the page. (If you have an Apple, click on the nearby Download for Mac link.) And download Garmin Express' installer to your computer, save it, then double-click upon it to install Garmin Express.

Then start the program, Garmin Express. Then connect your Garmin device. Then use Garmin Express to update your device.

(If this answers your question, please rate my answer, so that this case may be closed. If you need further information, just Reply To Expert and let me know. Thanks.)

Customer: replied 3 months ago.
I'm at sea and need my radar have no access to computer. Will have to pull it out what I get back
Expert:  Russell H. replied 3 months ago.

OK, I see.

Is it running off the boat's power supply? if so, double-check on the power supplied to it. In such a situation, it is unlikely to be a battery problem.

(If this completes the case as far as you're concerned, please rate my answer. Thanks, ***** ***** luck.)